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

A solenoid is a coil of wire which is:

Question # 2

The pointer of a magnetic compass:

Question # 3

The SI unit of flux density is

Question # 4

Which one of the following relations is correct?

Question # 5

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 6

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 7

Charge to mass ratio (e/m) of an electron is given by the relation

Question # 8

A current carrying conductor sets up its own:

Question # 9

A long wire wound tightly on a cylindrical core is called:

Question # 10

The voltage increases linearly with

Question # 11

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

Question # 12

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 13

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

Question # 14

NmA-1 is commonly called:

Question # 15

Magnetic flux and flux density are related by

Question # 16

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

Question # 17

Electron gun consist of

Question # 18

The magnetic field outside the solenoid due to current is

Question # 19

The magnetic field inside a solenoid can be increased by:

Question # 20

The torque per unit twist of coil is called

Question # 21

Lorentz force is defined as

Question # 22

A beam of electrons is provided by an

Question # 23

The magnetic field in the middle of a solenoid due to current is

Question # 24

In the region surrounding a current carrying wire:

Question # 25

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 # 26

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

Question # 27

The SI unit of magnetic permeability is

Question # 28

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is

Question # 29

F = I(L x B) is a

Question # 30

The current sensitivity of the galvanometer is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
2 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)
3

Amperean path is a:
A.

Closed path

B.

Rectangular path

C.

Circular path

D.

Any of above
4 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
5 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
6 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
7 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
8 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
9 The working of galvanometer depends upon torque exerted on a current carrying coil in
A. magnetic field
B. electric field
C. gravitational field
D. nuclear field
10 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these

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