First slide
Faraday's law of Electromagnetic induction
Question

A metallic ring, having area 1 m2 and resistance 10Ω is held in a uniform magnetic field of induction 2μT with its plane perpendicular to the field. If the field is switched off in a time interval of 0.1 second, then the average current induced is 

Easy
Solution

ε=Average induced emf 

=1×20.1μV=20μV

 Average current I=2010μA=2μA.

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