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 SI unit of flux density is.

Question # 2

The current sensitivity of the galvanometer is

Question # 3

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

Question # 4

Flurescent screen is a screen where visible spot

Question # 5

Resistance is measured in

Question # 6

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

Question # 7

For the conversion of galvanometer into voltmeter, we connect a

Question # 8

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

Question # 9

Avo-meter is used of measure the

Question # 10

Lorentz force is defined as

Question # 11

In the region surrounding a current carrying wire:

Question # 12

Which is modified form of galvanometer

Question # 13

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

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

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

Question # 16

A resistance used in voltmeter is called

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

CRO deflects the beam of

Question # 19

In a moving coil galvanometer, the deflecting couple depends upon

Question # 20

Weber is a unit of

Question # 21

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 22

The sources of magnetic field are

Question # 23

The angle of deflection of coil can be measured by the

Question # 24

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

Question # 25

The magnetic field outside the solenoid due to current is

Question # 26

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 # 27

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

Question # 28

The vector representation of force experience give the direction of

Question # 29

The current is measured in

Question # 30

The CRO is used for displaying the waveform of a given

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
2 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
3 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
4 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
A. F = B2
B. F = 0
C. F = B
D. F = B/2
5 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter
6 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
7 For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as
A. modification
B. voltage
C. current
D. resistance
8 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
9 The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by
A. F =q(v/B)
B. F=q2(v x B)
C. F=q(v x B)
D. F= vx B
10 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density

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