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 pointer of a magnetic compass:

Question # 2

The magnetic field in the middle of a solenoid due to current is

Question # 3

The gavanometer constant of a moving coil galvanometer is given by

Question # 4

The most suitable material for permanent magnet is

Question # 5

The magnetic field inside a solenoid can be increased by:

Question # 6

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 7

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

Question # 8

To convert galvanometer into ammeter we connect

Question # 9

The angle of deflection of coil can be measured by the

Question # 10

F = I(L x B) is a

Question # 11

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

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

A charged particle moving at right angle to the magnetic field will experience

Question # 14

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

Question # 15

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 # 16

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 # 17

The SI unit of magnetic flux is.

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

NmA-1 is commonly called:

Question # 22

The SI unit of flux density is.

Question # 23

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 24

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 # 25

The SI unit of flux density is

Question # 26

Method "lamp and scale arrangement" used to measure the

Question # 27

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 28

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

Question # 29

The vector representation of force experience give the direction of

Question # 30

A full-scale deflection is obtained in a galvanometer with a current of few

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
2 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)
3 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
4 For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as
A. modification
B. voltage
C. current
D. resistance
5 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
6 The SI unit of magnetic induction is
A. Gauses
B. Tesla
C. Weber
D. Weber2
7 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
8 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
9 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
10 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

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