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

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

Question # 2

A beam of electrons is provided by an

Question # 3

The torque per unit twist of coil is called

Question # 4

The SI unit of magnetic permeability is

Question # 5

A galvanometer is an instrument used to

Question # 6

How many number of anodes used in electron gun

Question # 7

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

Question # 8

CRO deflects the beam of

Question # 9

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 # 10

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 # 11

The SI unit of magnetic flux is.

Question # 12

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

Question # 13

The gavanometer constant of a moving coil galvanometer is given by

Question # 14

The direction of lines of force depends upon the direction of

Question # 15

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 16

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

Question # 17

Weber is a unit of

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

The force acting on a charge moving in a magnetic field

Question # 23

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

Question # 24

Which one of the following relations is correct?

Question # 25

Magnetic flux and flux density are related by

Question # 26

Magnetic lines of force:

Question # 27

Centripetal force for electron is given by

Question # 28

The magnetic field outside the solenoid due to current is

Question # 29

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 30

The vector representation of force experience give the direction of

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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)
2 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
3 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made
A. Sensitive
B. Accurate
C. Stable
D. None of these
4 How many number of anodes used in electron gun
A. one
B. two
C. three
D. six
5 In a straight current carrying conductor, the direction of magnetic field can be found by
A. right hand rule
B. left hand rule
C. head to tall rule
D. none of these
6 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these
7 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
8 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
9 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
10

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field

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