Electromagnetic Induction

Classical Mechanics Level 2

A coil is removed from a magnetic field. In which case the work done will be more?

1) when the coil is removed rapidly

2) when the coil is removed slowly

3) No work done in both the above cases

4) same work done in both the cases

Which of the following is the correct option?

3 1 2 4

Nashita Rahman by Nashita Rahman , 21, India

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2 solutions

Nashita Rahman
Sep 12, 2016

Work done will be more when the coil is removed rapidly. This is because in that case, opposing e.m.f induced in the coil will be more.

4 Helpful 0 Interesting 0 Brilliant 0 Confused
Swapnil Das
Sep 12, 2016

From Faraday's law, we get

E = − N d ϕ d t E=-N \frac{d\phi}{dt}

As work done per unit charge is electromotive force, the first choice is correct.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

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