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

Question # 2

The direction of lines of force depends upon the direction of

Question # 3

The pointer of a magnetic compass:

Question # 4

In the expression of force experienced by electron, the direction of both v and B are

Question # 5

The angle of deflection of coil can be measured by the

Question # 6

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

Question # 7

The sources of magnetic field are

Question # 8

Method "lamp and scale arrangement" used to measure the

Question # 9

The SI unit of magnetic flux is.

Question # 10

NmA-1 is commonly called:

Question # 11

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 12

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

Question # 13

A charged particle moving at right angle to the magnetic field will experience

Question # 14

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

Question # 15

CRO deflects the beam of

Question # 16

A shunt resistance parallel to the galvanometer is used to convert it into

Question # 17

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

Question # 18

Centripetal force for electron is given by

Question # 19

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

Question # 20

Which one of the following relations is correct?

Question # 21

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 22

The SI unit of magnetic induction is

Question # 23

It is customary represent a current flowing towards the reader by a symbol

Question # 24

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 # 25

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

Question # 26

Ammeter is used to measure

Question # 27

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

Question # 28

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

Question # 29

The field around a moving charge is called

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
2 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero
3 The force experienced by an electron projected in a magnetic field B with a velocity V is given by
A. F=e(V x B)
B. F= -e(V x B)
C. F= e(B x V)
D. Both a and c
4 When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
A. changed
B. zero
C. unchanged
D. none of these
5 The unit of flux density is also given by
A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
6 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
7 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
8 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
9 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
10 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

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