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  • If in a circular coil A of radius R, current i is flowing and in another coil B of radius 2R, current 2i is flowing, then the ratio of magnetic fields BA and BB at their centre is.<div class='q

If in a circular coil A of radius R, current i is flowing and in another coil B of radius 2R, current 2i is flowing, then the ratio of magnetic fields BA and BB at their centre is.

Option: 1

1


Option: 2

2


Option: 3

\frac{1}{2}


Option: 4

4


Answers (1)

best_answer

\mathrm{B_A=\frac{\mu_0 i}{2 R} \quad \text { and } \quad B_B=\frac{\mu_0(2 i)}{2(2 R)} }
                \mathrm{\therefore \frac{B_A}{B_B}=1}
 

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Divya Prakash Singh

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