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 shunt resistance parallel to the galvanometer is used to convert it into

Question # 2

A charged particle moving at right angle to the magnetic field will experience

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

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 5

In the region surrounding a current carrying wire:

Question # 6

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 7

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

Question # 8

The most suitable material for permanent magnet is

Question # 9

The CRO is used for displaying the waveform of a given

Question # 10

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

Question # 11

if the field is directed along the normal to the area, then flux is:

Question # 12

The magnetic field inside a solenoid can be increased by:

Question # 13

The angle of deflection of coil can be measured by the

Question # 14

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

Question # 15

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 16

Strength of magnetic field is measured in SI units, in:

Question # 17

The gavanometer constant of a moving coil galvanometer is given by

Question # 18

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 # 19

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 20

F = I(L x B) is a

Question # 21

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

Question # 22

Magnetic induction is also called as:

Question # 23

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

Question # 24

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

Question # 25

It is customary represent a current flowing towards the reader by a symbol

Question # 26

The current sensitivity of the galvanometer is

Question # 27

The SI unit of flux density is

Question # 28

The current is measured in

Question # 29

magnetic field is a:

Question # 30

To convert galvanometer into ammeter we connect

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by
A. F=eVB
B. F=e2V/B
C. F=e/VB
D. F=B2/ev
2 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
3 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
4 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
5 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
6 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
7 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these
8 The CRO deflects the beam of electrons, when they passes through uniform
A. electric field
B. gravitational field
C. magnetic flax
D. magnetic field
9 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
10 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G

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