Multiple Choice Questions

Magnetic Effects of Electric Current

Updated for CBSE 2027
Board Exam Preparation
132+ Practice Questions
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Practice Questions with Answers

Total 132 questions available

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Q. 1
The strength of magnetic field inside a long current-carrying straight solenoid is :
A
More at the ends then at the center
B
Minimum in the middle
C
Found to increase from one end to the another
D
Same at all points
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Q. 2
Commercial electric motors do not use:
A
Effectively large number of conducting wire in the current carrying coil
B
A permanent magnet to rotate the armature
C
A soft iron core on which the coil is wound
D
An, electromagnetic to rotate the armature
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Q. 3
Electric power is transmitted over long distance through conducting wires at very high voltage because :
A
Relative strength of magnetic field is shown by the degree of closeness of the field lines
B
High voltage can be stepped down to desired levels easily
C
Magnetic field lines are closed curves
D
The power losses are reduced to minimum
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Q. 4
Where do magnetic field lines originate and terminate in a magnet?
A
They originate from the south pole and terminate at the north pole
B
They originate from the north pole and terminate at the south pole
C
They originate from the center of the magnet
D
They terminate at the center of the magnet
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Q. 5
A small magnet is placed perpendicular to a uniform magnet field. The forces acting on the magnet will result in
A
Clockwise
B
Rotational motion
C
Translatory motion
D
Towards south
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Q. 6
The magnetic field is the strongest at
A
both poles.
B
North pole
C
East pole
D
south pole.
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Q. 7
Which of the following determines the direction of magnetic field due to a current carrying conductor?
A
Maxwell’s cork screw-rule
B
Faraday’s laws of electromagnetic induction
C
Fleming’s left-hand rule
D
Heating effect of current
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Q. 8
What is the behavior of a compass when it moves around a magnetic field line?
A
It remains stationary
B
It spins rapidly
C
It vibrates
D
It aligns itself along the direction of the magnetic field line
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Q. 9
The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of the circular wire is:
A
Anticlockwise
B
Upwards
C
Clockwise
D
Towards south
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Q. 10
What does the magnitude of induced emf not depend on when a magnet is inserted into a coil?
A
The number of turns in the coil.
B
The speed at which the magnet is moved.
C
The material's resistivity of the coil.
D
The strength of the magnet
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Q. 11
Who is credited with accidentally discovering the relationship between electricity and magnetism?
A
Thomas Edison
B
Albert Einstein
C
Isaac Newton
D
Hans Christian Oersted
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Q. 12
What tool detects magnetic fields at a location?
A
Powerful magnet
B
Coiled wire
C
Compass needle
D
Wire carrying electricity
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Q. 13
What is the path traced by the north pole pointer of a compass under the influence of a magnetic field called?
A
Magnetic route
B
Magnetic line
C
Field trail
D
Magnetic field line
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Q. 14
What produces a magnetic field around a current-carrying wire?
A
Magnetism
B
Electricity
C
Heat
D
Light
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Q. 15
The direction of force acting on a current carrying conductor placed in a magnetic field can be obtained by:
A
Ampere's swimming rule.
B
Clock face rule.
C
Fleming's left hand rule.
D
Fleming's right hand rule.
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Q. 16
Birds do not feel electric shock while sitting on a current carrying uninsulated wires because :
A
In horizontal as well as in vertical planes around the magnet
B
The feathers of birds act as an insulator and hence current does not pass through them
C
The potential difference between the two claws of birds is very small
D
The current does not pass through the body as the claws of birds are non-conducting
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Q. 17
At the time of short circuit, the current in the circuit:
A
Increases heavily
B
Vary continuously
C
Does not change
D
Reduces substantially
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Q. 18
AC generator works on the principle of
A
faraday’s law of electromagnetic induction.
B
ohnis law
C
Joule’s law of heating
D
none of the above
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Q. 19
A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:
A
In horizontal as well as in vertical planes around the magnet
B
In all planes around the magnet
C
Only in vertical plane around the magnet
D
Only in horizontal plane around the magnet
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Q. 20
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current change once in each
A
half revolution
B
two revolutions
C
One rotation
D
One-fourth rotation
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Q. 21
Which statement about magnetic field lines is wrong?
A
The field lines go from North to South inside the magnet.
B
The density of field lines indicates the strength of the magnet.
C
The field is tangent to the magnetic field line.
D
Magnetic field lines form closed and continuous curves.
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Q. 22
How many fundamental forces in nature are commonly known?
A
Two
B
Three
C
Four
D
Five
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Q. 23
The strength of an electromagnet after the limit cannot be increased by increasing the current through the solenoid. What is the reason behind this phenomenon?
A
Resistance of the solenoid increases.
B
Electrons start to corrode the solenoid.
C
Voltage through the solenoid gradually starts to decrease.
D
Current flowing through the solenoid is saturated.
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Q. 24
Which of the following is not true
A
We cannot isolate a single pole
B
We can magnetise an iron ring
C
A permanent magnet retains its magnetism even when heated on a flame.
D
Increasing the size of the gap in which the armature turns
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Q. 25
Unit of (a) (c) is :
A
Fleming
B
ev
C
Ampere
D
Farad
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Q. 26
Which of the following combination is not correct ?
A
Electric generator-Electromagnetic induction
B
Compass Needle-Small Magnet
C
Electric Motor-Fleming's right hand rule
D
Earth wire-Green colour
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Q. 27
Which of the following determine the direction of magnetic field due to a current carrying conductor?
A
Lenz's law
B
Maxwell's cork screw-rule
C
Fleming's left hand rule
D
Faraday's laws of electromagnetic induction
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Q. 28
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is:
A
towards east
B
downward
C
towards south
D
upward
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Q. 29
What is responsible for the generation of current?
A
Static charge
B
Motion of charges
C
Magnetic field strength
D
Size of the conductor
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Q. 30
The mains power supply of a house is through a 2A fuse. How many 50W bulbs can be used in this house at the normal voltage?
A
5
B
8
C
9
D
6
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Q. 31
Magnetic effect of current was discovered by
A
MCD
B
Bohr
C
Motor
D
Oersted
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Q. 32
What is induced emf or current directly proportional to?
A
The rate of change in the magnetic field
B
The resistance of the wire
C
The length of the wire
D
The strength of the magnetic field
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Q. 33
A bar magnet is immersed in a heap of iron fillings and pulled out. The amount of iron filling clinging to the:
A
Magnet will be same all along its length
B
North pole is almost equal to the South pole
C
North pole is much more than the South Pole
D
North pole is almost less equal than the South pole
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Q. 34
What happens to magnetic field lines?
A
They cross each other at right angles.
B
They cross each other at a 45-degree angle.
C
They cross each other at a 60-degree angle.
D
They never cross each other.
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Q. 35
What is needed for electromagnetic induction to occur?
A
The galvanometer must move relative to the wire coil.
B
The wire coil must move relative to a magnet.
C
The galvanometer must move relative to a magnet.
D
The galvanometer must move relative to an electric motor.
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Q. 36
How does the direction of the thumb in Fleming's left-hand rule relate to the motion of the charge?
A
It indicates the direction of the magnetic field
B
It indicates the direction of the current
C
It indicates the direction of the force
D
It indicates the direction of the charge
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Q. 37
Metal which can be used for construction of base of magnetic compass is :
A
Nickel
B
Aluminium
C
Cobalt
D
Iron
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Q. 38
The direction of magnetic field around a straight conductor carrying current can be determined by
A
Lenz’s law
B
Right hand thumb rule
C
A compass needle
D
South-north
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Q. 39
By removing the inducing magnets, the induced magnetism is:
A
Not Charged
B
Finished just after
C
Finished after sometime
D
Non-finished for a long time
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Q. 40
Commercial motors do not use:
A
an electromagnet to rotate the armature
B
effectively large number of turns of conducting wire in the current carrying coil
C
a permanent magnet to rotate the armature
D
a soft iron core on which the coil is wound
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Q. 41
The core of electromagnet is made of:
A
copper
B
magnesium
C
soft iron
D
steel
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Q. 42
The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the North pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was:
A
At rest inside the solenoid
B
Moving out of the solenoid
C
Moving into the solenoid
D
Moving towards the solenoid
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Q. 43
A 3 pin mains plug is fitted to the cable for a 1 kW electric kettle to be used on a 250 V a.c. supply which of the following statements is not correct?
A
A 13 A fuse is the most appropriate value to use.
B
The fuse should be fitted in the live wire.
C
The neutral wire is coloured black.
D
The green wire should be connected to the earth pin.
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Q. 44
What determines the direction of induced current in a conductor?
A
The material of the conductor
B
The temperature of the conductor
C
The direction of relative motion between the conductor and magnetic field
D
The size of the conductor
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Q. 45
How does a compass align itself when moved around a magnetic field line?
A
It points straight down
B
It points straight up
C
It aligns tangentially along the curves of the magnetic field line
D
It spins in circles
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Q. 46
The magnetic field inside the solenoid is:
A
zero
B
same at all points
C
variable
D
non-uniform
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Q. 47
How many magnetic poles are there in a current carrying solenoid?
A
two
B
nine
C
ten
D
four
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Q. 48
What factors determine the magnitude of force experienced by a charge moving in a magnetic field?
A
Color and size of the charge
B
Velocity and strength of the magnetic field
C
Temperature and pressure of the charge
D
Shape and texture of the charge
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Q. 49
What causes a current-carrying conductor to experience a force when near a magnet?
A
The magnet's temperature
B
The magnet's color
C
The magnet's size
D
The magnet's magnetic field
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Q. 50
What happens to a small compass near a magnet?
A
It becomes smaller
B
It experiences a force
C
It stops working
D
It changes color
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Q. 51
Which color wire is used for earthing ?
A
Green or yellow
B
yellow
C
none of these
D
Green
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Q. 52
What happens to the magnetic field lines when a strong bar magnet is placed vertically above a surface?
A
They only form in a horizontal plane around the magnet.
B
They only form in a vertical plane around the magnet.
C
They form in both horizontal and vertical planes around the magnet.
D
They form in all planes around the magnet.
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Q. 53
What is electromagnetism?
A
The study of electric cars
B
The study of the relationship between electricity and magnetism
C
The study of the Earth's magnetic field
D
The study of atomic structure
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Q. 54
Which of the following instruments works by electromagnetic induction?
A
Motor
B
Moving coil galvanometer.
C
Dynamo.
D
Telephone receiver.
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Q. 55
Who has stated the Right hand Thumb Rule?
A
Einstein
B
Maxwell
C
Ammeter
D
Voltmeter
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Q. 56
The phenomenon of electromagnetic induction is:
A
the process of generating magnetic field due to a current passing through a coil.
B
producing induced current in a coil due to relative motion between a magnet and the coil.
C
the process of rotating a coil of an electric motor.
D
the process of charging a body.
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Q. 57
The essential difference between an A.C. generator and a D.C. generator is that:
A
A.C. generator has slip rings while the D.C. generator has a commutator.
B
A.C. generator will generate a higher voltage.
C
D.C. generator will generate a higher voltage.
D
A.C. generator has an electromagnet while a D.C. generator has permanent magnet.
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Q. 58
The most important safety method used for protecting home appliance from short circuiting on overloading is:
A
use of fuse
B
use of stabilizers
C
earthing
D
use of fuse electric meter
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Q. 59
When does induced current flow in a conductor?
A
When the conductor is stationary
B
When the conductor is heated
C
When there are no changes in the magnetic field
D
When the magnetic field through the conductor changes
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Q. 60
What happens to the magnetic field produced by a wire when the current direction is reversed?
A
It stays the same
B
It changes direction
C
It gets stronger
D
It gets weaker
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Q. 61
No force acts on a current carrying conductor when it is placed-
A
The neutral wire is coloured black
B
far away from the magnetic field
C
parallel to the magnetic field
D
perpendicular to the magnetic field
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Q. 62
Which of the following processes will not produce new magnetic poles?
A
running a current through a straight wire
B
cutting a bar magnet in half
C
Magnetic effect of current
D
Heating effect of current
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Q. 63
We can induce the current in a coil by
A
by changing the orientation of the coil in the magnetic field
B
by changing the magnetic field around it
C
moving the coil in a magnetic field
D
Straight conductor carrying current
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Q. 64
If the force exerted on a current carrying wire placed in a magnetic field is zero, then the angle between wire and the direction of magnetic field is
A
75°
B
90°
C
180°
D
150°
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Q. 65
Rashita and her friends were decorating the class bulletin board. She accidentally dropped the box of stainless steel pins by mistake. She tried to collect the pins using a magnet. She could not succeed. Why?
A
Steel pins are very long
B
They are not using the magnet in right direction
C
Steel is not magnetic in nature
D
Steel pins are very heavy and cannot be lifted magnet
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Q. 66
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
A
towards east
B
Transformer
C
upward
D
Galvanometer
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Q. 67
Which technologies were later developed based on Oersted's discovery?
A
Airplane and telephone
B
Radio, television, and fibre optics
C
Printing press and steam engine
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Q. 68
The strength of magnetic field inside a long current carrying straight solenoid is:
A
uniform at all points.
B
found to increase from one end to the other.
C
minimum in the middle.
D
more at the ends than at the centre.
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Q. 69
If a charged particle moves along a magnetic field line, what happens to the magnetic force on the particle?
A
It goes in the same direction as its movement.
B
There is no magnetic force.
C
It goes in the opposite direction to its movement
D
It goes at a right angle to its movement.
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Q. 70
In Fleming's left-hand rule, what does the direction of the thumb represent?
A
The direction of motion
B
The flow of electricity
C
The direction of the magnetic field
D
The presence of electric charge
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Q. 71
Induced current flows through a coil
A
for less than the period during which flux changes through it.
B
Only in vertical plane around the magnet
C
All of these
D
only for the period during which flux changes through it.
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Q. 72
The shape of the earth’s magnetic field resembles that of an imaginary:
A
Bar magnet
B
Current-carrying circular coil
C
Straight conductor carrying current
D
U-shaped magnet
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Q. 73
What type of force does electromagnetism study?
A
Electromagnetic force
B
Gravitational force
C
Magnetic force
D
Nuclear force
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Q. 74
A positively-charged particle (alphaparticle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
A
Faraday
B
upward
C
towards east
D
Fleming
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Q. 75
Which of the following is not an example of the right hand thumb rule ?
A
A.C. generator
B
D.C. motor
C
Solenoid
D
Cartesian coordinate system
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Q. 76
By removing the inducing magnet, the induced magnetism is
A
Does not change
B
Finished just after
C
Not finished for a long time
D
Increases heavily
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Q. 77
If an electron is moving to the right (east) and a magnetic field is pointing downward, in which direction will the magnetic force act?
A
Towards the right (east)
B
Towards the left (west)
C
Towards the north
D
Towards the south
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Q. 78
Which one of the following substances is the magnetic substances?
A
Oersted
B
Silver
C
Fleming
D
Iron
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Q. 79
Which hand is used in Fleming's left-hand rule?
A
Left hand
B
Right hand
C
Both hands
D
None of the hands
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Q. 80
If it takes 520 turns to make a solenoid that is 40 cm long with a radius of 1.2 m that carries a current of 6 A, then determine the magnetic field inside the solenoid.
A
9.8 x 10-3T
B
8.4 x 10-4T
C
10.2 x 10-4T
D
7.2 x 10-3 T
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Q. 81
A toaster of 4 kW is running in an existing circuit 110 volt that has a stream ranking of 4 A. Find the stream of electrons drawn by the toaster.
A
9.06 A
B
14.6 A
C
23.34 A
D
36.36 A
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Q. 82
The direction of induced current is given by
A
Cross at an angle of 600
B
Fleming’s right hand rule
C
Do not cross one another
D
Right hand thumb rule
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Q. 83
At the time of short circuit , the current in the circuit
A
Vary continuously
B
Plastics
C
Iron and steel
D
Increases heavily
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Q. 84
In normal use, a current of 3.5 A flows through a hair dryer. Choose a suitable fuse from the given:
A
Thirty A
B
Three A
C
Five A
D
Ten A
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Q. 85
A finite straight wire carries a current of 3 A, where it is a 2 m long and weighs around 240 g. If it is suspended in the mid-air by a uniform magnetic field then calculate the field B. [Acceleration due to gravity = 9.8 m/s2]
A
0.42 T
B
0.37 T
C
0.39 T
D
0.61 T
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Q. 86
What does Fleming's left-hand rule help determine?
A
Direction of magnetic field
B
Direction of electric current
C
Direction of temperature change
D
Direction of motion
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Q. 87
Current that does not change its direction after equal intervals of time is called:
A
Magnetic effect of current
B
direct current
C
Static electricity
D
Chemical effect of current
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Q. 88
A vertical wire carries a current upward. The magnetic field north of the wire will be directed
A
westward
B
upward
C
Ammeter
D
Voltmeter
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Q. 89
The phenomena of electromagnetic induction is
A
AC generator has an electromagnet while a DC generator has permanent magnet
B
AC generator has slip rings while the DC generator has a commutator
C
the process of rotating a coil of an electric motor.
D
producing induced current in a coil due to relative motion between a magnet and the coil
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Q. 90
How can we observe the effect of a magnetic field on a compass?
A
By listening to sounds
B
By feeling heat
C
By observing deflection in the compass needle
D
By smelling scents
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Q. 91
What can magnetic field lines help us figure out?
A
The shape of the magnetic field.
B
Only the direction of the magnetic field.
C
Only the relative strength of the magnetic field.
D
Both the direction and the relative strength of the magnetic field.
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Q. 92
When the bars of bismuth are placed between the magnetic poles they set their length
A
along the lines of force
B
Current-carrying circular coil
C
perpendicular to the lines of force
D
Of hike in the supply voltage
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Q. 93
Which of the following statement is not correct about two parallel conductors carrying equal currents in the same direction?
A
The process of charging a body
B
Electrical energy into mechanical energy
C
Each of the conductors will repel each other.
D
The two conductors will repel each other.
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Q. 94
What happened to a compass needle when an electric current passed through a nearby metallic wire?
A
It stayed still
B
It vibrated
C
It deflected
D
It broke
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Q. 95
On which of the following does not exert any force when kept in uniform magnetic field?
A
Stationary magnet
B
Stationary charge
C
Moving charge
D
Moving magnet
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Q. 96
Inside the magnet, the field lines move:
A
away from South poles
B
away from North pole
C
from South to North
D
from North to South
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Q. 97
The most suitable material for making the core of an electromagnet is:
A
Galvanometer
B
Generator
C
Steel
D
Soft iron
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Q. 98
The north pole of earth magnet is in the:
A
Geographical east
B
Geographical south
C
Geographical north
D
Geographical west
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Q. 99
What is induced current?
A
A current that flows due to changes in a magnetic field
B
A current that flows in a wire when it carries electricity
C
A current that flows in a wire without any source
D
A current that flows in a wire when it's heated
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Q. 100
The most common device for providing an emf is :
A
Generator
B
Electric cell
C
Ammeter
D
All of these
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Q. 101
To avoid risk of electrical shock, which phenomena is used?
A
Ammeter
B
Earthing
C
Short circuiting
D
Clockwise
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Q. 102
The magnetic lines of force, inside a current carrying solenoid, are
A
perpendicular to the axis and equidistance from each other
B
In horizontal as well as in vertical planes around the magnet
C
In all planes around the magnet
D
along the axis and are parallel to each other
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Q. 103
An electric charge in uniform motion produces
A
both electric and magnetic fields
B
an electric field only
C
A stationary electric charge
D
An unmagnetised iron bar
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Q. 104
The process of inducing a current in a coil of wire by placing it in a region of changing magnetic field is:
A
Magnetic effect of current
B
Electromagnetic induction
C
Heating effect of current
D
Electrical effect
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Q. 105
Consider the following statements and choose the correct are:
A
A magnet is an object which attracts pieces of iron, Nickel and cobalt
B
The end of a freely suspended magnet which points towards the north direction is called the north pole of the magnet
C
A magnet is an object which attracts pieces of iron, Nickel and cobalt
D
All of the above
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Q. 106
The magnetic field of the current was discovered by:
A
Fleming
B
Oersted
C
Maxwell
D
Faraday
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Q. 107
A tesla is equivalent to a
A
newton per ampere-meter
B
newton per ampere-second
C
Electric charge
D
Electric energy
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Q. 108
On increasing number of turns magnetic field of a solenoid:
A
West pole
B
East pole
C
Decrease
D
Increase
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Q. 109
The strength of magnetic field inside a long current carrying straight solenoid is
A
Geographical west
B
same at all points
C
minimum in the middle
D
Geographical east
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Q. 110
Strength of the magnetic field at a point in the space surrounding the magnet is measured by:
A
resistance of it.
B
length of the magnet.
C
thickness of the magnet.
D
number of lines crossing a given point.
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Q. 111
When does a charge experience a force in a magnetic field?
A
When the charge is at rest
B
When the charge is stationary
C
When the charge is in motion
D
When the charge is small
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Q. 112
The touching of the live wire and neutral wire directly is known as :
A
Short circuit
B
Over loading
C
One rotation
D
None of these
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Q. 113
What causes induced emf or current to increase?
A
A decrease in the rate of change in the magnetic field
B
An increase in the rate of change in the magnetic field
C
A decrease in the resistance of the wire
D
An increase in the temperature of the wire
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Q. 114
Fleming's Right-hand rule gives:
A
Both, direction and magnitude of the induced current.
B
Direction of the induced current.
C
Magnitude of the magnetic field.
D
Magnitude of the induced current.
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Q. 115
A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act
A
vertically downwards.
B
vertically upwards.
C
Voltmeter
D
Transformer
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Q. 116
What would change the amount the meter moves when a bar magnet is pushed into a long coil?
A
How quickly the magnet is pushed into the coil.
B
The direction the coil is wrapped.
C
Which end of the coil the magnet goes into.
D
Which pole of the magnet enters the coil first.
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Q. 117
Who has stated the Right hand Thumb Rule?
A
Einstein
B
Maxwell
C
Orsted
D
Circuit
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Q. 118
A DC generator is based on the principle of:
A
Magnetic effect of current
B
Heating effect of current
C
Electromagnetic induction
D
Electrochemical induction
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Q. 119
What unit of magnetic field was named after Hans Christian Oersted?
A
Newton
B
Tesla
C
Oersted
D
Joule
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Q. 120
The device used for producing electric current is called a :
A
Motor
B
Ammeter
C
Generator
D
Galvanometer
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Q. 121
Which of the following correctly describes the magnetic field near a long straight wire?
A
Circular, but they do not intersect each other
B
The field consists of concentric circles centred on the wire.
C
The field consists of straight lines parallel to the wire.
D
Circular at the ends inside the solenoid
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Q. 122
Which of the following properties of a proton can change while it moves freely in a magnetic field?
A
Oersted
B
Maxwell
C
Kinetic energy.
D
Momentum
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Q. 123
What happens to the magnetic lines of force inside a current-carrying solenoid?
A
They are perpendicular to the axis.
B
They run along the axis and are parallel to each other.
C
They are parallel inside the solenoid and circular at the ends.
D
They are circular.
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Q. 124
Which one of the following substances is the magnetic substances?
A
Iron
B
Silver
C
Mercury
D
Gold
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Q. 125
The magnetic field strength of a solenoid can be increased by inserting:
A
an iron piece into it.
B
a glass piece into it.
C
paper roll into it.
D
a wooden piece into it.
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Q. 126
In Fleming’s right hand rule direction in induced current is given by:
A
middle finger
B
first finger
C
Towards south
D
Anticlockwise
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Q. 127
The effective length of the magnet is
A
the half of the length of the magnet
B
The field consists of straight lines parallel to the wire
C
The field consists of radial lines originating from the wire
D
the distance between the two poles of the magnet
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Q. 128
The magnetic field lines inside a solenoid are in the form of:
A
Circular lines
B
Curved line
C
Parallel straight lines
D
Zig-zag lines
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Q. 129
The frequency of direct current (DC) is:
A
50 Hz
B
30 Hz
C
0 Hz
D
25 Hz
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Q. 130
Magnetic field due to a current through a straight conductor depends on
A
Aluminium
B
Soft iron
C
distance from the wire
D
Both (a) and (b)
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Q. 131
A TV set consumes an electric power of 230 watts and runs on 230 volts mains supply. The correct fuse for this TV set is:
A
One A
B
Two A
C
Three A
D
Five A
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Q. 132
Direction of rotation of a coil in electric motor is determined by
A
faraday law of electromagnetic inductors
B
fleming’s right hand rule
C
fleming’s left hand rule
D
None of above
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