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 an electron projected in a magnetic field B with a velocity V is given by

Question # 2

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

Question # 3

The current sensitivity of the galvanometer is

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The SI unit of magnetic permeability is

Question # 8

CRO deflects the beam of

Question # 9

Ammeter is used to measure

Question # 10

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

Question # 11

The strength of magnetic field around the current conductor is

Question # 12

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 # 13

Magnetic flux and flux density are related by

Question # 14

The SI unit of flux density is.

Question # 15

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

Question # 16

The magnetic field outside the solenoid due to current is

Question # 17

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 18

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 19

Weber is a unit of

Question # 20

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

Question # 21

The magnetic field inside a solenoid can be increased by:

Question # 22

A resistance used in galvanometer to make it voltmeter is called

Question # 23

A resistance used in voltmeter is called

Question # 24

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

Question # 25

In the formula B= µ̻ nl, the symbol n denotes:

Question # 26

The vector representation of force experience give the direction of

Question # 27

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

Question # 28

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

Question # 29

F = I(L x B) is a

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 The most suitable material for permanent magnet is
A. cobalt
B. iron
C. steel
D. alaminium
3 A field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid
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 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
6 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these
7 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
8 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
9 The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the
A. magnetic flux
B. magnetic induction
C. magnetic field
D. self inductance
10 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these

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