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

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

Question # 2

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

Question # 3

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 # 4

The force acting on a charge moving in a magnetic field

Question # 5

CRO deflects the beam of

Question # 6

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

Question # 7

The voltage increases linearly with

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

Magnetic flux and flux density are related by

Question # 10

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

Question # 11

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

Question # 12

A field is uniform and much stronger:

Question # 13

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

Question # 14

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

Question # 15

A resistance used in galvanometer to make it voltmeter is called

Question # 16

The unit of flux density is also given by

Question # 17

In the region surrounding a current carrying wire:

Question # 18

Electron gun consist of

Question # 19

The torque per unit twist of coil is called

Question # 20

How many number of anodes used in electron gun

Question # 21

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 # 22

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

Question # 23

Galvanometer is a device used for the detection of

Question # 24

magnetic field is a:

Question # 25

Ammeter is used to measure

Question # 26

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

Question # 27

The pointer of a magnetic compass:

Question # 28

The SI unit of magnetic induction is

Question # 29

The field around a moving charge is called

Question # 30

A beam of electrons is provided by an

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
2 The galvanometer can be made sensitive if the value of the factor C/BAN is
A. constant
B. small
C. large
D. none of these
3 The permeability of free space is measured in:
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
4

the current is pass through the straight wire. The magnetic field established around it has its lines of force:
A.

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
5 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
6 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
7 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
8 Magnetic induction is also called as:
A.

Ampere’s law

B.

Faraday’s law

C.

Lenz’s law

D.

Newton’s law
9 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
10 CRO deflects the beam of
A. proton
B. a-particle
C. electron
D. neutron

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