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

Avo-meter is used of measure the

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

Centripetal force for electron is given by

Question # 6

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

Question # 7

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 # 8

A galvanometer is an instrument used to

Question # 9

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 10

Flurescent screen is a screen where visible spot

Question # 11

The magnetic field outside the solenoid due to current is

Question # 12

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

Question # 13

A beam of electrons is provided by an

Question # 14

Galvanometer is a device used for the detection of

Question # 15

Which one of the following relations is correct?

Question # 16

A solenoid is a coil of wire which is:

Question # 17

Magnetic induction is also called as:

Question # 18

if the field is directed along the normal to the area, then flux is:

Question # 19

The SI unit of magnetic permeability is

Question # 20

Weber is a unit of

Question # 21

Method "lamp and scale arrangement" used to measure the

Question # 22

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

Question # 23

In a moving coil galvanometer, the deflecting couple depends upon

Question # 24

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

Question # 25

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 # 26

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

Question # 27

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

Question # 28

The current is measured in

Question # 29

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 # 30

Which is modified form of galvanometer

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
2 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
A. Voltmeter
B. Avometer
C. Ammeter
D. None of these
3 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force
4 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
5 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
6 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
A. F = B2
B. F = 0
C. F = B
D. F = B/2
7 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
8 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
9 Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:
A.

Thumb

B.

Curled fingers

C.

Middle finger

D.

Arm of right hand
10 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

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