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

magnetic field is a:

Question # 2

The sources of magnetic field are

Question # 3

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 4

Method "lamp and scale arrangement" used to measure the

Question # 5

The SI unit of magnetic induction is

Question # 6

The CRO is used for displaying the waveform of a given

Question # 7

For the conversion of galvanometer into voltmeter, we connect a

Question # 8

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 # 9

Centripetal force for electron is given by

Question # 10

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

Question # 11

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

Question # 12

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 # 13

Lorentz force is defined as

Question # 14

Amperean path is a:

Question # 15

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

Question # 16

Flurescent screen is a screen where visible spot

Question # 17

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

Question # 18

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 # 19

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

Question # 20

The most suitable material for permanent magnet is

Question # 21

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

Question # 22

Avo-meter is used of measure the

Question # 23

How many number of anodes used in electron gun

Question # 24

The torque per unit twist of coil is called

Question # 25

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

Question # 26

Ammeter is used to measure

Question # 27

The field around a moving charge is called

Question # 28

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 29

Which is modified form of galvanometer

Question # 30

The magnetic field inside a solenoid can be increased by:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
3 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
A. 5N
B. 4N
C. 1.5N
D. 6N
4 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them
5 Magnetic induction is also called as:
A.

Ampere’s law

B.

Faraday’s law

C.

Lenz’s law

D.

Newton’s law
6 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
7 NmA-1 is commonly called:
A. Weber
B. Apmere
C. Guass
D. Coulomb
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 The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called
A. magnetic flux
B. magnetic flux density
C. magnetic induction
D. magnetic field intensity
10 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

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