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

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

Question # 2

The strength of magnetic field around the current conductor is

Question # 3

Electron gun consist of

Question # 4

Centripetal force for electron is given by

Question # 5

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

Question # 6

F = I(L x B) is a

Question # 7

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

Question # 8

The CRO deflects the beam of electrons, when they passes through uniform

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

Question # 11

The magnetic field inside a solenoid can be increased by:

Question # 12

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

Question # 13

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

Question # 14

The SI unit of flux density is

Question # 15

A galvanometer is an instrument used to

Question # 16

Avo-meter is used of measure the

Question # 17

Weber is a unit of

Question # 18

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

Question # 19

Which is modified form of galvanometer

Question # 20

A field is uniform and much stronger:

Question # 21

NmA-1 is commonly called:

Question # 22

The direction of lines of force depends upon the direction of

Question # 23

The torque per unit twist of coil is called

Question # 24

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

Question # 25

A resistance used in galvanometer to make it voltmeter is called

Question # 26

The sources of magnetic field are

Question # 27

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

Question # 28

A current carrying conductor sets up its own:

Question # 29

The force acting on a charge moving in a magnetic field

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by
A. F =q(v/B)
B. F=q2(v x B)
C. F=q(v x B)
D. F= vx B
2 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
3 Magnetic induction is also called as:
A.

Ampere’s law

B.

Faraday’s law

C.

Lenz’s law

D.

Newton’s law
4 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these
5 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
6

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

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
7 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
8 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
A. Voltmeter
B. Avometer
C. Ammeter
D. None of these
9 Galvanometer is a device used for the detection of
A. voltage
B. current
C. temperature
D. pressure
10 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these

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