ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

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

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ECAT Pre General Science Physics Chapter 14 Electromagnetism

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Question # 1

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 2

Flurescent screen is a screen where visible spot

Question # 3

In the region surrounding a current carrying wire:

Question # 4

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 5

Electron gun consist of

Question # 6

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

Question # 7

magnetic field is a:

Question # 8

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

Question # 9

Current is measured in

Question # 10

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 11

In a straight current carrying conductor, the direction of magnetic field can be found by

Question # 12

The voltage increases linearly with

Question # 13

The magnetic field inside a solenoid can be increased by:

Question # 14

In the formula B= µ̻ nl, the symbol n denotes:

Question # 15

Centripetal force for electron is given by

Question # 16

F = I(L x B) is a

Question # 17

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 18

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 19

NmA-1 is commonly called:

Question # 20

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 # 21

The SI unit of flux density is.

Question # 22

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 23

When current passes through a solenoid coil, it behaves like a

Question # 24

The torque per unit twist of coil is called

Question # 25

A solenoid is a coil of wire which is:

Question # 26

The gavanometer constant of a moving coil galvanometer is given by

Question # 27

The force acting on a charge moving in a magnetic field

Question # 28

Resistance is measured in

Question # 29

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Question # 30

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
2 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
3 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force
4 The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
5 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
A. Voltmeter
B. Avometer
C. Ammeter
D. None of these
6 A relationship between Gauses of magnetic induction and Tesla(T) is given by
A. G 10-3T
B. G = 10-2T
C. G = 10-4T
D. G = 10-1T
7 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
8 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
9 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
10 The force experienced by charged particle is maximum, if it moves
A. parallel to magnetic field
B. perpendicular to magnetic field
C. opposite to the magnetic field
D. none of these

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