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

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 # 3

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

Question # 4

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 # 5

The voltage increases linearly with

Question # 6

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

Question # 7

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 8

The gavanometer constant of a moving coil galvanometer is given by

Question # 9

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 10

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 11

The current is measured in

Question # 12

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

Question # 13

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

Question # 14

The unit of flux density is also given by

Question # 15

Magnetic flux and flux density are related by

Question # 16

CRO deflects the beam of

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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 # 21

The vector representation of force experience give the direction of

Question # 22

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 # 23

The strength of magnetic field around the current conductor is

Question # 24

Tesla is the unit of

Question # 25

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

Question # 26

The sources of magnetic field are

Question # 27

The torque per unit twist of coil is called

Question # 28

A resistance used in voltmeter is called

Question # 29

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

Question # 30

The SI unit of flux density is.

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The force experienced by an electron projected in a magnetic field B with a velocity V is given by
A. F=e(V x B)
B. F= -e(V x B)
C. F= e(B x V)
D. Both a and c
2 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these
3 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
4 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
5 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
6 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
7 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
8 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
9 A current carrying conductor sets up its own:
A.

Electric field

B.

Nuclear field

C.

Magnetic field

D.

Both (A) and (C)
10 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these

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