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

How many number of anodes used in electron gun

Question # 2

A long wire wound tightly on a cylindrical core is called:

Question # 3

The magnetic field outside the solenoid due to current is

Question # 4

The most suitable material for permanent magnet is

Question # 5

Lorentz force is defined as

Question # 6

Electron gun consist of

Question # 7

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

Question # 8

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

Question # 9

NmA-1 is commonly called:

Question # 10

The SI unit of magnetic permeability is

Question # 11

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

Question # 12

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

Question # 13

Weber is a unit of

Question # 14

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

Question # 15

Tesla is the unit of

Question # 16

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

Question # 17

A solenoid is a coil of wire which is:

Question # 18

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

Question # 19

The strength of magnetic field around the current conductor is

Question # 20

The SI unit of magnetic induction is

Question # 21

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

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

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

Question # 24

The direction of lines of force depends upon the direction of

Question # 25

Magnetic induction is also called as:

Question # 26

Galvanometer is a device used for the detection of

Question # 27

The SI unit of magnetic flux is

Question # 28

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

Question # 29

Charge to mass ratio (e/m) of an electron is given by the relation

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
4 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density
5 The force experienced by charged particle is maximum, if it moves
A. parallel to magnetic field
B. perpendicular to magnetic field
C. opposite to the magnetic field
D. none of these
6 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
7 To convert galvanometer into ammeter we connect
A. small resistance in parallel with galvanometer
B. small resistance in series with galvanometer
C. high resistance in series with galvanometer
D. high resistance in parallel with galvanometer
8

the current is pass through the straight wire. The magnetic field established around it has its lines of force:
A.

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
9 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
10 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

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