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

Galvanometer is a device used for the detection of

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 SI unit of magnetic induction is

Question # 4

Ammeter is used to measure

Question # 5

Centripetal force for electron is given by

Question # 6

The pointer of a magnetic compass:

Question # 7

The unit of magnetic flux is

Question # 8

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

Question # 9

The CRO deflects the beam of electrons, when they passes through uniform

Question # 10

Magnetic lines of force:

Question # 11

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

Question # 12

magnetic field is a:

Question # 13

A resistance used in voltmeter is called

Question # 14

The magnetic field inside a solenoid can be increased by:

Question # 15

A solenoid is a coil of wire which is:

Question # 16

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

Question # 17

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 # 18

Avo-meter is used of measure the

Question # 19

In a moving coil galvanometer, the deflecting couple depends upon

Question # 20

Method "lamp and scale arrangement" used to measure the

Question # 21

Current is measured in

Question # 22

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

Question # 23

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

Question # 24

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

Question # 25

A voltmeter is used to measure the

Question # 26

The force acting on a charge moving in a magnetic field

Question # 27

The most suitable material for permanent magnet is

Question # 28

How many number of anodes used in electron gun

Question # 29

To convert galvanometer into ammeter we connect

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
2 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
3 When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
A. changed
B. zero
C. unchanged
D. none of these
4 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
5 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
6 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
7 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
A. dead beat galvanometer
B. stable galvanometer
C. shunt galvanometer
D. sensitive galvanomter
8 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°
9 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
10 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force

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