Question

I have seen these two (2) equations for the emf when a coil is placed in...

I have seen these two (2) equations for the emf when a coil is placed in a magnetic field:

i) emf =-0 - NBA/t

ii) emf = - NBA/t

Please explain if they are both correct and when to use each. Thanks

Science   Advanced-Physics   
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Answer #1

Both are correct.

(i) Now if initially flux is passing through loop but after t time it is zero i.e. no magnetic field lines are passing through loop, then

where N is number of turns in loop and A is area of one loop.

(ii) Initially flux is zero and finally flux is nonzero, then

I will be glad to see your comment if you have any query and thumb up if you are satisfied. Thanks....

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