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Physics ECAT Pre Engineering Chapter 14 Electromagnetism Online Test MCQs With Answers

Question # 1

The gavanometer constant of a moving coil galvanometer is given by

Choose an answer

K=BAN/C

K=BN/CA

K=NAC/B

K=C/BAN

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Question # 2

A solenoid is a coil of wire which is:

Choose an answer

Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

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Question # 3

The current is measured in

Choose an answer

volts

watt

ampere

ohm

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Question # 4

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

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parallel to magnetic field

perpendicular to magnetic field

opposite to the magnetic field

none of these

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Question # 5

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

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Question # 6

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

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Question # 7

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

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circular

elliptical

cycloid

straight line

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Question # 8

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

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velocity

graph plotting

time-velocity

none of these

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Question # 9

The vector representation of force experience give the direction of

Choose an answer

magnetic field

current

length of conductor

force

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Question # 10

Lorentz force is defined as

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q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

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Question # 11

F = I(L x B) is a

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vector

scalar

unit vector

none of these

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Question # 12

if the field is directed along the normal to the area, then flux is:

Choose an answer

Maximum

Equal to zero

Equal to BA

Minimum

Both (A) and (C)

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