ECAT Pre Computer Science Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

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ECAT Physics Chapter 14 Electromagnetism

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Question # 1

The field around a moving charge is called

Question # 2

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 3

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

Question # 4

For the conversion of galvanometer into voltmeter, we connect a

Question # 5

The SI unit of magnetic induction is

Question # 6

In the expression of force experienced by electron, the direction of both v and B are

Question # 7

Centripetal force for electron is given by

Question # 8

How many number of anodes used in electron gun

Question # 9

Lorentz force is defined as

Question # 10

The current is measured in

Question # 11

The permeability of free space is measured in:

Question # 12

The direction of lines of force depends upon the direction of

Question # 13

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 14

The SI unit of flux density is

Question # 15

Amperean path is a:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In the region surrounding a current carrying wire:
A. A magnetic field is setup

B.

The lines of force are elliptical

C.

Direction of lines of forces depends upon direction of current

D.

Both (A) and (C)
2 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
3 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
4 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these
5 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
6

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
7 The force experienced by an electron projected in a magnetic field B with a velocity V is given by
A. F=e(V x B)
B. F= -e(V x B)
C. F= e(B x V)
D. Both a and c
8 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
9 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these
10 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid

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