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

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

Question # 2

Centripetal force for electron is given by

Question # 3

Electron gun consist of

Question # 4

A resistance used in voltmeter is called

Question # 5

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

Question # 6

A current carrying conductor sets up its own:

Question # 7

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

Question # 8

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

Question # 9

F = I(L x B) is a

Question # 10

A solenoid is a coil of wire which is:

Question # 11

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The field around a moving charge is called

Question # 16

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

Question # 17

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

Question # 18

CRO deflects the beam of

Question # 19

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

Question # 20

Which is modified form of galvanometer

Question # 21

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 22

The permeability of free space is measured in:

Question # 23

In the formula B= µ̻ nl, the symbol n denotes:

Question # 24

The SI unit of magnetic permeability is

Question # 25

Ammeter is used to measure

Question # 26

The direction of lines of force depends upon the direction of

Question # 27

To convert galvanometer into ammeter we connect

Question # 28

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

Question # 29

The pointer of a magnetic compass:

Question # 30

The gavanometer constant of a moving coil galvanometer is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In order to make a voltmeter, high resistance is connected with galvanometer, in
A. perpendicular
B. may be paralled or pendicular
C. series
D. none of these
2 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
3 The most suitable material for permanent magnet is
A. cobalt
B. iron
C. steel
D. alaminium
4 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:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
5 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
6 If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are
A. n/AL
B. Al/n
C. nAL
D. nA/L
7 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
8 Strength of magnetic field is measured in SI units, in:
A. N
B. N/Am
C. Am/N
D. Nm/A
9 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
10 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant

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