Electromagnetic Induction Mcqs

Our collections of Multiple choice questions and answers focuses on study of Electromagnetic Induction in Physics. These questions are chosen from a collection of most authoritative and best reference books on Physics. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate knowledge on Electromagnetic Induction in Physics comprehensively.

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Computer MCQS

Sciences MCQS

16.
For long distance transmission the transformer used is

Step down

Input voltage and output voltage remain same

Step up

Amplifier is used

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17.
If the coil is wound on an iron core the flux through it will

Decrease

Become zero

Remain the same

Increase

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18.
If the secondary coil has Ns turns and the primary Np turns the relation between secondary and primary voltages is given by

Vs/Vp = Np/Ns

Vs/Vp = Ns/Np

Vp/Vs = Ns/Np

Vp/Vs = Np/Ns

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20.
Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied is known as magnetic

Retaintivity

Permeability

Flux

Hysteresis

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21.
Long distance transmission is easy for

D.C voltage

A.C voltage

Half A.C voltage

Half D.C voltage

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22.
Magnetic compass needle will be deflecting if it is kept near

Static charge

Soft iron

Semi-conductor

Accelerating charge

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23.
Non inductive resistances are used in decreasing

Mutual inductance

Self inductance

Magnetic fields

Heating effect

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24.
Power loss in actual transformer is due to

Small output

Eddy currents and magnetic hysterias

Soft iron core

Back emf

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25.
Self inductance of a coil depends upon

Current flowing

Number of turns per unit length

Voltage produce

All

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27.
The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is

1?s

1.5?s

106sec

1sec

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28.
The emf induced in a coil by a changing magnetic flux may have unit as

Ms-1A

Ms-2A-1

Kgms2A-1

Kgm2s-1A-1

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29.
The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to

Magnetic flux density

Torque

Mutual induction

Motional emf

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30.
The only difference between construction of D.C generator and A.C generator is that of

Carbon brushes

Coil

Commutator

Magnetic field

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