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

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 # 2

Weber is a unit of

Question # 3

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

Question # 4

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 # 5

CRO deflects the beam of

Question # 6

Lorentz force is defined as

Question # 7

The current is measured in

Question # 8

The magnetic field inside a solenoid can be increased by:

Question # 9

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 # 10

In the region surrounding a current carrying wire:

Question # 11

A field is uniform and much stronger:

Question # 12

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:

Question # 13

magnetic field is a:

Question # 14

Strength of magnetic field is measured in SI units, in:

Question # 15

Magnetic flux and flux density are related by

Question # 16

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

Question # 17

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 # 18

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 # 19

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

Question # 20

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

Question # 21

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

Question # 22

The field around a moving charge is called

Question # 23

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

Question # 24

The SI unit of magnetic induction is

Question # 25

A resistance used in galvanometer to make it voltmeter is called

Question # 26

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

Question # 27

Electron gun consist of

Question # 28

Magnetic induction is also called as:

Question # 29

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

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 CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
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 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
4 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
5 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
6 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
7 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
8 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
9 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
10 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)

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