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If in circular coil of radius R, current...

If in circular coil of radius `R`, current `I` is flowing and in another coil `B` of radius `2R` a current `2I` is flowing , then the raatio of the magnetic fields `B_(A) and B_(B)`, produced by them will be

A

4

B

`1//2`

C

2

D

1

Text Solution

Verified by Experts

The correct Answer is:
D
`(B_(A))/(B_(B))=(mu_(0))/(4pi) ((2pii)/(R))xx(4pi)/(mu_(0))((2R)/(2pi xx2i))=1`
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