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

In the region surrounding a current carrying wire:

Question # 2

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

Question # 3

The unit of magnetic flux is

Question # 4

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

Question # 5

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

Question # 6

Lorentz force is defined as

Question # 7

Amperean path is a:

Question # 8

A galvanometer is an instrument used to

Question # 9

F = I(L x B) is a

Question # 10

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 11

The CRO is used for displaying the waveform of a given

Question # 12

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

Question # 13

The SI unit of magnetic flux is.

Question # 14

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 # 15

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

Question # 16

For the conversion of galvanometer into voltmeter, we connect a

Question # 17

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

Question # 18

The field around a moving charge is called

Question # 19

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

Question # 20

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

Question # 21

The sources of magnetic field are

Question # 22

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 23

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 # 24

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

Question # 25

Ammeter is used to measure

Question # 26

Which is modified form of galvanometer

Question # 27

Tesla is the unit of

Question # 28

The permeability of free space is measured in:

Question # 29

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 # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
3 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
4 The working of galvanometer depends upon torque exerted on a current carrying coil in
A. magnetic field
B. electric field
C. gravitational field
D. nuclear field
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
A. 90°
B. 75°
C. 0°
D. 180°
6 Avo-meter is used of measure the
A. current, voltage
B. voltage, resistance
C. resistance, current
D. current, voltage and resistance
7

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
8

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

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
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 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

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