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

Electron gun consist of

Question # 2

The gavanometer constant of a moving coil galvanometer is given by

Question # 3

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

Question # 4

The voltage increases linearly with

Question # 5

Flurescent screen is a screen where visible spot

Question # 6

A resistance used in voltmeter is called

Question # 7

A galvanometer is an instrument used to

Question # 8

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 9

The field around a moving charge is called

Question # 10

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 # 11

A resistance used in galvanometer to make it voltmeter is called

Question # 12

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 # 13

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

Question # 14

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 # 15

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

Question # 16

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Question # 17

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

Question # 18

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

Question # 19

Centripetal force for electron is given by

Question # 20

The most suitable material for permanent magnet is

Question # 21

A current carrying conductor sets up its own:

Question # 22

Weber is a unit of

Question # 23

The CRO is used for displaying the waveform of a given

Question # 24

The vector representation of force experience give the direction of

Question # 25

The pointer of a magnetic compass:

Question # 26

The permeability of free space is measured in:

Question # 27

In the region surrounding a current carrying wire:

Question # 28

magnetic field is a:

Question # 29

The force acting on a charge moving in a magnetic field

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The strength of magnetic field around the current conductor is
A. Smaller near the conductor
B. Greater near the conductor
C. Greater at the large distance from the conductor
D. Constant near and away from the conductor
2 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
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 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
5 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
6 Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:
A.

Thumb

B.

Curled fingers

C.

Middle finger

D.

Arm of right hand
7 The SI unit of magnetic flux is
A. NmA-2
B. NmA-1
C. NAm-1
D. Nm2A-1
8 In order to make a voltmeter, high resistance is connected with galvanometer, in
A. perpendicular
B. may be paralled or pendicular
C. series
D. none of these
9 When current passes through a solenoid coil, it behaves like a
A. loop
B. circle
C. bar magnet
D. none of these
10

Amperean path is a:
A.

Closed path

B.

Rectangular path

C.

Circular path

D.

Any of above

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