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

The unit of flux density is also given by

Question # 2

The current is measured in

Question # 3

Lorentz force is defined as

Question # 4

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

Question # 5

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 6

The SI unit of magnetic permeability is

Question # 7

The gavanometer constant of a moving coil galvanometer is given by

Question # 8

Electron gun consist of

Question # 9

The strength of magnetic field around the current conductor is

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Current is measured in

Question # 15

Resistance is measured in

Question # 16

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

Question # 17

The most suitable material for permanent magnet is

Question # 18

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

Question # 19

The angle of deflection of coil can be measured by the

Question # 20

Avo-meter is used of measure the

Question # 21

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Question # 22

The SI unit of magnetic flux is.

Question # 23

A resistance used in galvanometer to make it voltmeter is called

Question # 24

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

Question # 25

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

Question # 26

For the conversion of galvanometer into voltmeter, we connect a

Question # 27

The magnetic field outside the solenoid due to current is

Question # 28

A beam of electrons is provided by an

Question # 29

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

Question # 30

The CRO deflects the beam of electrons, when they passes through uniform

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
2 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
3 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
4 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
5 How many number of anodes used in electron gun
A. one
B. two
C. three
D. six
6 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
7 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
8 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:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
9 A field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid
10 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter

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