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

Question # 2

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 # 3

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

Question # 4

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 # 5

For the conversion of galvanometer into voltmeter, we connect a

Question # 6

The field around a moving charge is called

Question # 7

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

Question # 8

The current sensitivity of the galvanometer is

Question # 9

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 # 10

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

Question # 11

Galvanometer is a device used for the detection of

Question # 12

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

Question # 13

Magnetic flux and flux density are related by

Question # 14

The force acting on a charge moving in a magnetic field

Question # 15

A solenoid is a coil of wire which is:

Question # 16

magnetic field is a:

Question # 17

The SI unit of magnetic induction is

Question # 18

How many number of anodes used in electron gun

Question # 19

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 # 20

A charged particle moving at right angle to the magnetic field will experience

Question # 21

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

Question # 22

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 23

A resistance used in galvanometer to make it voltmeter is called

Question # 24

Avo-meter is used of measure the

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Electron gun consist of

Question # 30

The gavanometer constant of a moving coil galvanometer is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
2

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
3 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
4 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them
5 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G
6 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
7 The permeability of free space is measured in:
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
8 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
9 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
10 Total number of turns on 0.15 m length solenoid is 300. the value of n is:
A. Greater than 300
B. Smaller than 300
C. Equal to 300
D. Any of (A) or (B)

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