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 force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 2

The force acting on a charge moving in a magnetic field

Question # 3

The CRO is used for displaying the waveform of a given

Question # 4

A full-scale deflection is obtained in a galvanometer with a current of few

Question # 5

The SI unit of magnetic induction is

Question # 6

Flurescent screen is a screen where visible spot

Question # 7

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

Question # 8

The SI unit of magnetic induction is tesla which is equal to

Question # 9

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 10

Electron gun consist of

Question # 11

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 12

Method "lamp and scale arrangement" used to measure the

Question # 13

The magnetic field outside the solenoid due to current is

Question # 14

The angle of deflection of coil can be measured by the

Question # 15

In a moving coil galvanometer, the deflecting couple depends upon

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
2 Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:
A.

Thumb

B.

Curled fingers

C.

Middle finger

D.

Arm of right hand
3 The angle of deflection of coil can be measured by the
A. one method
B. three method
C. two method
D. none of these
4 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
5 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
6 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
7 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
8 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
9 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
10 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum

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