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

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

Question # 2

The magnetic field inside a solenoid can be increased by:

Question # 3

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

Question # 4

The SI unit of flux density is

Question # 5

The unit of flux density is also given by

Question # 6

The unit of magnetic flux is

Question # 7

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

Question # 8

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 # 9

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

Question # 10

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

Question # 11

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 12

The pointer of a magnetic compass:

Question # 13

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 14

Method "lamp and scale arrangement" used to measure the

Question # 15

The SI unit of magnetic permeability is

Question # 16

Tesla is the unit of

Question # 17

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 # 18

Avo-meter is used of measure the

Question # 19

Ammeter is used to measure

Question # 20

Resistance is measured in

Question # 21

The field around a moving charge is called

Question # 22

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 # 23

The current sensitivity of the galvanometer is

Question # 24

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 # 25

The permeability of free space is measured in:

Question # 26

The force acting on a charge moving in a magnetic field

Question # 27

Which one of the following relations is correct?

Question # 28

A resistance used in galvanometer to make it voltmeter is called

Question # 29

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Question # 30

The voltage increases linearly with

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
2 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
3 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
4 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
5 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
6 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
7 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
8 The current is measured in
A. volts
B. watt
C. ampere
D. ohm
9 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
10 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point

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