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

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 permeability of free space is measured in:

Question # 4

Avo-meter is used of measure the

Question # 5

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 6

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 7

Resistance is measured in

Question # 8

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 9

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

Question # 10

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 11

A voltmeter is used to measure the

Question # 12

A solenoid is a coil of wire which is:

Question # 13

It is customary represent a current flowing towards the reader by a symbol

Question # 14

The force acting on a charge moving in a magnetic field

Question # 15

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

Question # 16

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

Question # 17

The current is measured in

Question # 18

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

Question # 19

The gavanometer constant of a moving coil galvanometer is given by

Question # 20

The most suitable material for permanent magnet is

Question # 21

Current is measured in

Question # 22

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

Question # 23

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 # 24

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

Question # 25

The pointer of a magnetic compass:

Question # 26

To convert galvanometer into ammeter we connect

Question # 27

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

Question # 28

A field is uniform and much stronger:

Question # 29

F = I(L x B) is a

Question # 30

In the region surrounding a current carrying wire:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
2 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
3 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)
4 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
5 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum
6 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these
7 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them
8 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
9 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)
10 Magnetic induction is also called as:
A.

Ampere’s law

B.

Faraday’s law

C.

Lenz’s law

D.

Newton’s law

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