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

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 2

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 3

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

Question # 4

Method "lamp and scale arrangement" used to measure the

Question # 5

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 # 6

Which one of the following relations is correct?

Question # 7

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

Question # 8

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 # 9

For the conversion of galvanometer into voltmeter, we connect a

Question # 10

The SI unit of magnetic flux is

Question # 11

It is customary represent a current flowing towards the reader by a symbol

Question # 12

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

Question # 13

The SI unit of magnetic permeability is

Question # 14

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

Question # 15

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

Question # 16

The torque per unit twist of coil is called

Question # 17

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

Question # 18

The SI unit of magnetic induction is tesla which is equal to

Question # 19

The CRO is used for displaying the waveform of a given

Question # 20

Which is modified form of galvanometer

Question # 21

The SI unit of magnetic flux is.

Question # 22

Electron gun consist of

Question # 23

Magnetic induction is also called as:

Question # 24

magnetic field is a:

Question # 25

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

Question # 26

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

Question # 27

The sources of magnetic field are

Question # 28

Flurescent screen is a screen where visible spot

Question # 29

A current carrying conductor sets up its own:

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is
A. 90°
B. 75°
C. 0°
D. 180°
2

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
3 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
4 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
A. 5N
B. 4N
C. 1.5N
D. 6N
5 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
6 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero
7 The working of galvanometer depends upon torque exerted on a current carrying coil in
A. magnetic field
B. electric field
C. gravitational field
D. nuclear field
8 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
9 The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above
10 Magnetic flux and flux density are related by
A. Flux density = flux x area
B. Flux density = flux / area
C. Flux density = flux - area
D. None of these

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