ELECTROMAGNETIC INDUCTION QUIZ

Two 300 uH coils in series without mutual coupling have a total inductance of

900 uH

300 uH

1200 uH

600 uH

TRUE ANSWER : ?
YOUR ANSWER : ?

The law that the induced e.m.f. and current always oppose the cause producing them is due to

Coulomb

Newton

Faraday

Lenz

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following circuit elements will oppose the change in circuit current?

Capacitance

Inductance

Resistance

All of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of an inductance, current is proportional to

None of the listed here

Voltage across the inductance

Magnetic field

Both of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

A moving magnetic field will produce the same effect as a conductor that is moving.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly

90 N

60 N

120 N

30 N

TRUE ANSWER : ?
YOUR ANSWER : ?

A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

15 V

25 V

12 V

10 V

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following inductor will have the least eddy current losses?

Laminated iron core

Powdered iron core

Iron core

Air core

TRUE ANSWER : ?
YOUR ANSWER : ?

An open coil has

Zero resistance and inductance

Zero resistance and high inductance

Infinite resistance and normal inductance

Infinite resistance and zero inductance

TRUE ANSWER : ?
YOUR ANSWER : ?

Mutually inductance between two magnetically coupled coils depends on

Cross-sectional area of their common core

Permeability of the core

All of the listed here

The number of their turns

TRUE ANSWER : ?
YOUR ANSWER : ?

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