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Electromagnetic induction

Electromagnetic induction
Lenz's law is a consequence of the law of conservation of

Induced e.m.f.
Induced current
Charge
Energy

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Electromagnetic induction
If current in a conductor increases then according to Lenz's law self-induced voltage will

Produce current opposite to the increasing current
Aid the applied voltage
Tend to decrease the amount of current
Aid the increasing current

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Electromagnetic induction
A crack in the magnetic path of an inductor will result in

Increased inductance
Unchanged inductance
Zero inductance
Reduced inductance

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Electromagnetic induction
The polarity of the induced voltage can be determined by using the left-hand generator rule.

No
Yes

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Electromagnetic induction
Which of the following is unit of inductance?

Hennry
Weber/metre
Ampere turns
Ohm

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Electromagnetic induction
Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be

Halved
Unaffected
Quadrupled
Doubled

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