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 current passes through a solenoid coil, it behaves like a

Question # 2

How many number of anodes used in electron gun

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

Avo-meter is used of measure the

Question # 5

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 # 6

Which one of the following relations is correct?

Question # 7

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

Question # 8

A resistance used in galvanometer to make it voltmeter is called

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

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

Question # 11

The current sensitivity of the galvanometer is

Question # 12

The current is measured in

Question # 13

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 # 14

In a moving coil galvanometer, the deflecting couple depends upon

Question # 15

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 16

if the field is directed along the normal to the area, then flux is:

Question # 17

The permeability of free space is measured in:

Question # 18

The SI unit of magnetic induction is

Question # 19

A field is uniform and much stronger:

Question # 20

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

Question # 21

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

Question # 22

The gavanometer constant of a moving coil galvanometer is given by

Question # 23

The SI unit of magnetic flux is

Question # 24

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 # 25

F = I(L x B) is a

Question # 26

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 # 27

Which is modified form of galvanometer

Question # 28

Magnetic induction is also called as:

Question # 29

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

Question # 30

A galvanometer is an instrument used to

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic induction is tesla which is equal to
A. Newton/ampere-meter or N/A-m
B. Newton/ampere2-meter or N/A2-m
C. Newton/ampere2-meter2 or N/A2-m2
D. Newton/ampere2-meter2or N/A2-m2
2 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
3 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
4 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
5 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
6 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
7 Magnetic flux and flux density are related by
A. Flux density = flux x area
B. Flux density = flux / area
C. Flux density = flux - area
D. None of these
8 The permeability of free space is measured in:
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
9 A current carrying conductor sets up its own:
A.

Electric field

B.

Nuclear field

C.

Magnetic field

D.

Both (A) and (C)
10 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero

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