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

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 2

The gavanometer constant of a moving coil galvanometer is given by

Question # 3

The magnetic field inside a solenoid can be increased by:

Question # 4

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

Question # 5

The permeability of free space is measured in:

Question # 6

magnetic field is a:

Question # 7

The current sensitivity of the galvanometer is

Question # 8

The magnetic field in the middle of a solenoid due to current is

Question # 9

In a moving coil galvanometer, the deflecting couple depends upon

Question # 10

CRO deflects the beam of

Question # 11

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 # 12

The CRO is used for displaying the waveform of a given

Question # 13

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

Question # 14

The angle of deflection of coil can be measured by the

Question # 15

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

Question # 16

The SI unit of magnetic permeability is

Question # 17

The force acting on a charge moving in a magnetic field

Question # 18

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 19

Resistance is measured in

Question # 20

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

Question # 21

Magnetic flux and flux density are related by

Question # 22

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

Question # 23

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

Question # 24

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 # 25

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

Question # 26

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 # 27

Method "lamp and scale arrangement" used to measure the

Question # 28

To convert galvanometer into ammeter we connect

Question # 29

The SI unit of flux density is

Question # 30

Flurescent screen is a screen where visible spot

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero
3 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
4 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
5 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
6 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force
7 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
8 The unit of flux density is also given by
A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
9 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
10 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these

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