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

A solenoid is a coil of wire which is:

Question # 2

The magnetic field outside the solenoid due to current is

Question # 3

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

Question # 4

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

Question # 5

When current passes through a solenoid coil, it behaves like a

Question # 6

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 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:

Question # 8

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

Question # 9

The torque per unit twist of coil is called

Question # 10

The SI unit of magnetic permeability is

Question # 11

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

Question # 12

Method "lamp and scale arrangement" used to measure the

Question # 13

F = I(L x B) is a

Question # 14

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

Question # 15

A long wire wound tightly on a cylindrical core is called:

Question # 16

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Question # 17

How many number of anodes used in electron gun

Question # 18

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 19

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 # 20

The strength of magnetic field around the current conductor is

Question # 21

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

Question # 22

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 23

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

Question # 24

Avo-meter is used of measure the

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

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 27

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 28

The sources of magnetic field are

Question # 29

The current sensitivity of the galvanometer is

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer
2 The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by
A. F=eVB
B. F=e2V/B
C. F=e/VB
D. F=B2/ev
3 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these
4 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
5 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
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
6 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
7 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them
8 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
9 Strength of magnetic field is measured in SI units, in:
A. N
B. N/Am
C. Am/N
D. Nm/A
10 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force

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