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

The most suitable material for permanent magnet is

Question # 2

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

Question # 3

Weber is a unit of

Question # 4

Method "lamp and scale arrangement" used to measure the

Question # 5

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

Question # 6

The torque per unit twist of coil is called

Question # 7

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

Question # 8

The SI unit of magnetic flux is

Question # 9

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

Question # 10

The direction of lines of force depends upon the direction of

Question # 11

The force acting on a charge moving in a magnetic field

Question # 12

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

Question # 13

A galvanometer is an instrument used to

Question # 14

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 15

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

Question # 16

Magnetic lines of force:

Question # 17

In a moving coil galvanometer, the deflecting couple depends upon

Question # 18

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

Question # 19

Galvanometer is a device used for the detection of

Question # 20

Electron gun consist of

Question # 21

Which is modified form of galvanometer

Question # 22

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

Question # 23

The sources of magnetic field are

Question # 24

The SI unit of flux density is

Question # 25

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 # 26

Flurescent screen is a screen where visible spot

Question # 27

Centripetal force for electron is given by

Question # 28

A resistance used in galvanometer to make it voltmeter is called

Question # 29

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

Question # 30

The current is measured in

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 NmA-1 is commonly called:
A. Weber
B. Apmere
C. Guass
D. Coulomb
3 Tesla is the unit of
A. Magnetic induction or flux density
B. Magnetic flux
C. Self inductance
D. None of these
4 The permeability of free space is measured in:
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
5 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
6 CRO deflects the beam of
A. proton
B. a-particle
C. electron
D. neutron
7 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
8 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
9 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G
10 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

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