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A wire of given length is first bent in one loop and then in three loops....

A wire of given length is first bent in one loop and then in three loops. If same current is passed in both cases, the ratio of magnetic inductions at the centre will be
Engineering   Electrical-Engineering   
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Answer #1

First we solve this question for n turn in place of 3 turn because that makes it easy to understand and you can calculate it for any number of turnas you can see that in first image i calculate first for single turn that is B

Then for n turn i.e B'

Then you can put any number of turn as in you question it is 3

So the ratio of B'/B is 9

If you have further quarry in above question please mention in comment

have a good day

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