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

A resistance used in voltmeter is called

Question # 2

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is

Question # 3

The gavanometer constant of a moving coil galvanometer is given by

Question # 4

Electron gun consist of

Question # 5

In the region surrounding a current carrying wire:

Question # 6

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

Question # 7

The SI unit of flux density is.

Question # 8

The angle of deflection of coil can be measured by the

Question # 9

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 # 10

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

Question # 11

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

Question # 12

A solenoid is a coil of wire which is:

Question # 13

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

Question # 14

Magnetic lines of force:

Question # 15

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 # 16

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

Question # 17

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 18

The SI unit of magnetic induction is

Question # 19

Which is modified form of galvanometer

Question # 20

The strength of magnetic field around the current conductor is

Question # 21

A galvanometer is an instrument used to

Question # 22

Which one of the following relations is correct?

Question # 23

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 24

The CRO is used for displaying the waveform of a given

Question # 25

NmA-1 is commonly called:

Question # 26

In the formula B= µ̻ nl, the symbol n denotes:

Question # 27

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

Question # 28

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

Question # 29

magnetic field is a:

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In the region surrounding a current carrying wire:
A. A magnetic field is setup

B.

The lines of force are elliptical

C.

Direction of lines of forces depends upon direction of current

D.

Both (A) and (C)
2 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
3 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
4 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
5 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter
6

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
7 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
8 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
9 If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
10 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform

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