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

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 # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

A current carrying conductor sets up its own:

Question # 7

F = I(L x B) is a

Question # 8

magnetic field is a:

Question # 9

A field is uniform and much stronger:

Question # 10

The strength of magnetic field around the current conductor is

Question # 11

The SI unit of flux density is

Question # 12

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 # 13

The magnetic field outside the solenoid due to current is

Question # 14

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 15

The sources of magnetic field are

Question # 16

The angle of deflection of coil can be measured by the

Question # 17

The CRO is used for displaying the waveform of a given

Question # 18

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 19

A solenoid is a coil of wire which is:

Question # 20

Magnetic induction is also called as:

Question # 21

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

Question # 22

Resistance is measured in

Question # 23

The magnetic field inside a solenoid can be increased by:

Question # 24

The current sensitivity of the galvanometer is

Question # 25

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

Question # 26

To convert galvanometer into ammeter we connect

Question # 27

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 28

Centripetal force for electron is given by

Question # 29

When current passes through a solenoid coil, it behaves like a

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
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 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
4

Amperean path is a:
A.

Closed path

B.

Rectangular path

C.

Circular path

D.

Any of above
5 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
6 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
7 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
8 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
9 The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by
A. F =q(v/B)
B. F=q2(v x B)
C. F=q(v x B)
D. F= vx B
10 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter

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