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

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

Question # 2

The permeability of free space is measured in:

Question # 3

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

Question # 4

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 5

Method "lamp and scale arrangement" used to measure the

Question # 6

Weber is a unit of

Question # 7

F = I(L x B) is a

Question # 8

A galvanometer is an instrument used to

Question # 9

magnetic field is a:

Question # 10

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

Question # 11

The SI unit of magnetic permeability is

Question # 12

How many number of anodes used in electron gun

Question # 13

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 14

Amperean path is a:

Question # 15

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 # 16

To convert galvanometer into ammeter we connect

Question # 17

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

Question # 18

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

Question # 19

Which is modified form of galvanometer

Question # 20

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

Question # 21

CRO deflects the beam of

Question # 22

The SI unit of magnetic flux is

Question # 23

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Question # 24

The SI unit of magnetic induction is

Question # 25

The unit of flux density is also given by

Question # 26

The CRO is used for displaying the waveform of a given

Question # 27

Which one of the following relations is correct?

Question # 28

A solenoid is a coil of wire which is:

Question # 29

A resistance used in voltmeter is called

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
2 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
3 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
4 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
5 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
6 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made
A. Sensitive
B. Accurate
C. Stable
D. None of these
7 The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by
A. F=eVB
B. F=e2V/B
C. F=e/VB
D. F=B2/ev
8

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
9 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
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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