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Electromagnetic induction

Electromagnetic induction
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
15 V
10 V

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Electromagnetic induction
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
Lies perpendicular to the magnetic flux
Cuts magnetic flux

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Electromagnetic induction
Which of the following is not a unit of inductance?

Coulomb/volt ampere
Hennry
All of the listed here
Volt second per ampere

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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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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

100 N
400 N
1000 N
300 N

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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 be

12 mH
48 mH
3 mH
24 mH

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