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 force experienced by charged particle is maximum, if it moves

Question # 3

Charge to mass ratio (e/m) of an electron is given by the relation

Question # 4

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

Question # 5

In the region surrounding a current carrying wire:

Question # 6

Magnetic flux and flux density are related by

Question # 7

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

Question # 8

Flurescent screen is a screen where visible spot

Question # 9

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

Question # 10

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

Question # 11

The SI unit of magnetic induction is

Question # 12

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

Question # 13

The SI unit of flux density is.

Question # 14

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 15

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

Question # 16

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

Question # 17

The magnetic field inside a solenoid can be increased by:

Question # 18

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

Question # 19

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 20

A voltmeter is used to measure the

Question # 21

A solenoid is a coil of wire which is:

Question # 22

Ammeter is used to measure

Question # 23

The pointer of a magnetic compass:

Question # 24

The CRO is used for displaying the waveform of a given

Question # 25

The SI unit of magnetic induction is tesla which is equal to

Question # 26

The unit of magnetic flux is

Question # 27

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Question # 28

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 29

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

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 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
2 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant
3

Amperean path is a:
A.

Closed path

B.

Rectangular path

C.

Circular path

D.

Any of above
4 Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:
A. Maximum
B. Minimum
C. Zero
D. Very small
5 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
6 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
7 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum
8 The force experienced by charged particle is maximum, if it moves
A. parallel to magnetic field
B. perpendicular to magnetic field
C. opposite to the magnetic field
D. none of these
9 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
10 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

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