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

Lorentz force is defined as

Question # 2

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 # 3

The pointer of a magnetic compass:

Question # 4

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

Question # 5

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 6

Avo-meter is used of measure the

Question # 7

The SI unit of magnetic induction is

Question # 8

The SI unit of magnetic permeability is

Question # 9

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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 # 14

The current is measured in

Question # 15

The force acting on a charge moving in a magnetic field

Question # 16

Which is modified form of galvanometer

Question # 17

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Question # 18

The angle of deflection of coil can be measured by the

Question # 19

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

Question # 20

The most suitable material for permanent magnet is

Question # 21

A solenoid is a coil of wire which is:

Question # 22

Current is measured in

Question # 23

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 # 24

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

Question # 25

A field is uniform and much stronger:

Question # 26

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 27

Resistance is measured in

Question # 28

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

Question # 29

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
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 The force experienced by an electron projected in a magnetic field B with a velocity V is given by
A. F=e(V x B)
B. F= -e(V x B)
C. F= e(B x V)
D. Both a and c
4 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
5 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
6 F = I(L x B) is a
A. vector
B. scalar
C. unit vector
D. none of these
7 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
8 The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called
A. magnetic flux
B. magnetic flux density
C. magnetic induction
D. magnetic field intensity
9 Tesla is the unit of
A. Magnetic induction or flux density
B. Magnetic flux
C. Self inductance
D. None of these
10 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br

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