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 torque per unit twist of coil is called

Question # 2

The sources of magnetic field are

Question # 3

The SI unit of magnetic induction is tesla which is equal to

Question # 4

A galvanometer is an instrument used to

Question # 5

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 # 6

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 # 7

The current sensitivity of the galvanometer is

Question # 8

The current is measured in

Question # 9

The pointer of a magnetic compass:

Question # 10

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

Question # 11

The SI unit of magnetic induction is

Question # 12

The SI unit of magnetic flux is

Question # 13

The most suitable material for permanent magnet is

Question # 14

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

Question # 15

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

Question # 16

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

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

F = I(L x B) is a

Question # 19

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

Question # 20

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

Question # 21

The force experienced by charged particle is maximum, if it moves

Question # 22

Current is measured in

Question # 23

The SI unit of flux density is.

Question # 24

The magnetic field inside a solenoid can be increased by:

Question # 25

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

Question # 26

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

Question # 27

The force acting on a charge moving in a magnetic field

Question # 28

Centripetal force for electron is given by

Question # 29

The strength of magnetic field around the current conductor is

Question # 30

How many number of anodes used in electron gun

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 CRO deflects the beam of
A. proton
B. a-particle
C. electron
D. neutron
3 In order to make a voltmeter, high resistance is connected with galvanometer, in
A. perpendicular
B. may be paralled or pendicular
C. series
D. none of these
4 The SI unit of magnetic flux is
A. NmA-2
B. NmA-1
C. NAm-1
D. Nm2A-1
5 The strength of magnetic field around the current conductor is
A. Smaller near the conductor
B. Greater near the conductor
C. Greater at the large distance from the conductor
D. Constant near and away from the conductor
6 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
A. 5N
B. 4N
C. 1.5N
D. 6N
7 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
8 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
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
9 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
10 The galvanometer can be made sensitive if the value of the factor C/BAN is
A. constant
B. small
C. large
D. none of these

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