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 SI unit of magnetic flux is

Question # 2

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 3

A beam of electrons is provided by an

Question # 4

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

Question # 5

The force acting on a charge moving in a magnetic field

Question # 6

Lorentz force is defined as

Question # 7

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 # 8

The field around a moving charge is called

Question # 9

The sources of magnetic field are

Question # 10

A galvanometer is an instrument used to

Question # 11

For the conversion of galvanometer into voltmeter, we connect a

Question # 12

The pointer of a magnetic compass:

Question # 13

Flurescent screen is a screen where visible spot

Question # 14

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

Question # 15

The CRO is used for displaying the waveform of a given

Question # 16

magnetic field is a:

Question # 17

The magnetic field inside a solenoid can be increased by:

Question # 18

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 # 19

A voltmeter is used to measure the

Question # 20

Which is modified form of galvanometer

Question # 21

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

Question # 22

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

Question # 23

The magnetic field outside the solenoid due to current is

Question # 24

Magnetic lines of force:

Question # 25

The current is measured in

Question # 26

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 # 27

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

Question # 28

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 29

A solenoid is a coil of wire which is:

Question # 30

Centripetal force for electron is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The unit of magnetic flux is
A. Weber-m2
B. Weber-m3
C. Henry
D. Weber
2 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
3 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
4 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
5 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant
6 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:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
7 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
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

Amperean path is a:
A.

Closed path

B.

Rectangular path

C.

Circular path

D.

Any of above
10 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these

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