ELECTROMAGNETIC INDUCTION QUIZ

The inductance of a coil will increase under all the following conditions except

When more area for each turn is provided

When the number of turns of the coil increase

When more length for the same number of turns is provided

When permeability of the core increases

TRUE ANSWER : ?
YOUR ANSWER : ?

As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it

Moves parallel to the direction of the magnetic field

Lies in a magnetic field

Cuts magnetic flux

Lies perpendicular to the magnetic flux

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is unit of inductance?

Hennry

Ampere turns

Ohm

Weber/metre

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YOUR ANSWER : ?

Which of the following circuit element stores energy in the electromagnetic field?

Inductance

Resistance

Condenser

Variable resistor

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A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?

0.1 s

0.2 s

None of the listed here

0.5 s

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YOUR ANSWER : ?

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

Newton

Faraday

Lenz

Coulomb

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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

12 V

25 V

10 V

15 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Resistance

Capacitance

Inductance

All of the listed here

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In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

2.0

1.0

2.5

0.5

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An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be

12 A/s

4 A/s

16 A/s

20 A/s

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YOUR ANSWER : ?

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