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 field is uniform and much stronger:

Question # 2

CRO deflects the beam of

Question # 3

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

Question # 4

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Question # 5

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 # 6

Flurescent screen is a screen where visible spot

Question # 7

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 # 8

The force acting on a charge moving in a magnetic field

Question # 9

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 # 10

The unit of magnetic flux is

Question # 11

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

Question # 12

The SI unit of magnetic permeability is

Question # 13

The direction of lines of force depends upon the direction of

Question # 14

The SI unit of magnetic induction is

Question # 15

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Question # 16

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 # 17

Which one of the following relations is correct?

Question # 18

The force experienced by charged particle is maximum, if it moves

Question # 19

In the expression of force experienced by electron, the direction of both v and B are

Question # 20

The pointer of a magnetic compass:

Question # 21

A voltmeter is used to measure the

Question # 22

Strength of magnetic field is measured in SI units, in:

Question # 23

For the conversion of galvanometer into voltmeter, we connect a

Question # 24

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

Question # 25

The vector representation of force experience give the direction of

Question # 26

To convert galvanometer into ammeter we connect

Question # 27

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

Question # 28

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

Question # 29

The magnetic field inside a solenoid can be increased by:

Question # 30

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

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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 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
3 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
4 The current is measured in
A. volts
B. watt
C. ampere
D. ohm
5 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
6 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
7 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
8 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
9 The force experienced by charged particle is maximum, if it moves
A. parallel to magnetic field
B. perpendicular to magnetic field
C. opposite to the magnetic field
D. none of these
10 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

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