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 magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 2

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is

Question # 3

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

Question # 4

The CRO is used for displaying the waveform of a given

Question # 5

A long wire wound tightly on a cylindrical core is called:

Question # 6

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 7

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

Question # 8

The torque per unit twist of coil is called

Question # 9

The gavanometer constant of a moving coil galvanometer is given by

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The SI unit of magnetic flux is

Question # 14

A beam of electrons is provided by an

Question # 15

Flurescent screen is a screen where visible spot

Question # 16

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

Question # 17

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

Question # 18

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 # 19

A voltmeter is used to measure the

Question # 20

The sources of magnetic field are

Question # 21

Magnetic induction is also called as:

Question # 22

CRO deflects the beam of

Question # 23

The force acting on a charge moving in a magnetic field

Question # 24

A solenoid is a coil of wire which is:

Question # 25

Weber is a unit of

Question # 26

The SI unit of magnetic flux is.

Question # 27

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

Question # 28

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 29

A current carrying conductor sets up its own:

Question # 30

A field is uniform and much stronger:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 To convert galvanometer into ammeter we connect
A. small resistance in parallel with galvanometer
B. small resistance in series with galvanometer
C. high resistance in series with galvanometer
D. high resistance in parallel with galvanometer
2 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density
3 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:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
4 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
5 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
6 When current passes through a solenoid coil, it behaves like a
A. loop
B. circle
C. bar magnet
D. none of these
7 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
8 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
9 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
10 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these

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