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 magnetic field inside a solenoid can be increased by:

Question # 2

A resistance used in galvanometer to make it voltmeter is called

Question # 3

In a moving coil galvanometer, the deflecting couple depends upon

Question # 4

A field is uniform and much stronger:

Question # 5

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

Question # 6

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

Question # 7

The torque per unit twist of coil is called

Question # 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:

Question # 9

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 # 10

Ammeter is used to measure

Question # 11

The gavanometer constant of a moving coil galvanometer is given by

Question # 12

The strength of magnetic field around the current conductor is

Question # 13

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

Question # 14

A beam of electrons is provided by an

Question # 15

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 16

Resistance is measured in

Question # 17

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

Question # 18

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

Question # 19

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 20

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

Question # 21

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 # 22

A voltmeter is used to measure the

Question # 23

The force experienced by charged particle is maximum, if it moves

Question # 24

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

Question # 25

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

Question # 26

The SI unit of magnetic flux is

Question # 27

The current sensitivity of the galvanometer is

Question # 28

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

Question # 29

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 # 30

Lorentz force is defined as

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
2 The CRO deflects the beam of electrons, when they passes through uniform
A. electric field
B. gravitational field
C. magnetic flax
D. magnetic field
3 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
4 41 The force experience, when proton projected in a magnetic field with velocity 'v' is
A. +e(v x B)
B. -C(V x B)
C. +e2(v x B)
D. -e(v2x B)
5 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
6 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
7 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
8 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
9 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
10 A relationship between Gauses of magnetic induction and Tesla(T) is given by
A. G 10-3T
B. G = 10-2T
C. G = 10-4T
D. G = 10-1T

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