ECAT Pre Computer Science Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

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ECAT Physics Chapter 14 Electromagnetism

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Question # 1

In the formula B= µ̻ nl, the symbol n denotes:

Question # 2

Avo-meter is used of measure the

Question # 3

The SI unit of flux density is.

Question # 4

magnetic field is a:

Question # 5

A voltmeter is used to measure the

Question # 6

Centripetal force for electron is given by

Question # 7

In a moving coil galvanometer, the deflecting couple depends upon

Question # 8

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 9

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

Question # 10

The force acting on a charge moving in a magnetic field

Question # 11

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

Question # 12

The direction of lines of force depends upon the direction of

Question # 13

The SI unit of magnetic flux is

Question # 14

CRO deflects the beam of

Question # 15

The SI unit of flux density is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
2 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
3 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
4 41 The force experience, when proton projected in a magnetic field with velocity 'v' is
A. +e(v x B)
B. -C(V x B)
C. +e2(v x B)
D. -e(v2x B)
5 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
6 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
7 The current is measured in
A. volts
B. watt
C. ampere
D. ohm
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 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer
10 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

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