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

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

Question # 2

The CRO deflects the beam of electrons, when they passes through uniform

Question # 3

The sources of magnetic field are

Question # 4

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

Question # 5

The magnetic field outside the solenoid due to current is

Question # 6

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

Question # 7

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 8

A beam of electrons is provided by an

Question # 9

Avo-meter is used of measure the

Question # 10

The gavanometer constant of a moving coil galvanometer is given by

Question # 11

In the region surrounding a current carrying wire:

Question # 12

The most suitable material for permanent magnet is

Question # 13

The magnetic field inside a solenoid can be increased by:

Question # 14

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

Question # 15

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Question # 16

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

Question # 17

A galvanometer is an instrument used to

Question # 18

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Question # 19

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

Question # 20

The unit of magnetic flux is

Question # 21

A current carrying conductor sets up its own:

Question # 22

Electron gun consist of

Question # 23

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 # 24

The vector representation of force experience give the direction of

Question # 25

Flurescent screen is a screen where visible spot

Question # 26

The SI unit of magnetic flux is.

Question # 27

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

Question # 28

The strength of magnetic field around the current conductor is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
2 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
3 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
4 CRO deflects the beam of
A. proton
B. a-particle
C. electron
D. neutron
5

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
6 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
7 Strength of magnetic field is measured in SI units, in:
A. N
B. N/Am
C. Am/N
D. Nm/A
8 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
9 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°
10 A field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid

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