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Electromagnetic induction

Electromagnetic induction
Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

300 N
100 N
1000 N
400 N

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Electromagnetic induction
Higher the self-inductance of a coil,

Lower the e.m.f. induced
Longer the delay in establishing steady current through it
Lesser its weber-turns
Greater the flux produced by it

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Electromagnetic induction
The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will

28 mH
12 mH
24 mH
3 mH

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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

Doubled
Unaffected
Quadrupled
Halved

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Electromagnetic induction
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

Mutual inductance
Self-inductance
Series aiding inductance
Capacitance

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

Yes
No

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