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 resistance used in voltmeter is called

Question # 2

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

Question # 3

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 # 4

Tesla is the unit of

Question # 5

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

Question # 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

Question # 7

Current is measured in

Question # 8

The most suitable material for permanent magnet is

Question # 9

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 # 10

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

Question # 11

A current carrying conductor sets up its own:

Question # 12

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

Question # 13

Lorentz force is defined as

Question # 14

F = I(L x B) is a

Question # 15

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Question # 16

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

Question # 17

Centripetal force for electron is given by

Question # 18

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

Question # 19

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

Question # 20

The current is measured in

Question # 21

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Question # 22

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

Question # 23

In a moving coil galvanometer, the deflecting couple depends upon

Question # 24

The torque per unit twist of coil is called

Question # 25

Ammeter is used to measure

Question # 26

magnetic field is a:

Question # 27

The current sensitivity of the galvanometer is

Question # 28

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 29

CRO deflects the beam of

Question # 30

Avo-meter is used of measure the

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 When current passes through a solenoid coil, it behaves like a
A. loop
B. circle
C. bar magnet
D. none of these
3 Galvanometer is a device used for the detection of
A. voltage
B. current
C. temperature
D. pressure
4 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
5 The unit of magnetic flux is
A. Weber-m2
B. Weber-m3
C. Henry
D. Weber
6 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these
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 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
9 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
10 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter

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