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Two concentric circular coils A and B h...

Two concentric circular coils `A` and `B` have radii `25cm` and `15cm` and carry currents `10A` and `15A` respectively. A has 24 turns and `B` has 18 turns. The direction of currents are in opposite order. The magnetic induction at the common centre of the coil is

A

`120 mu_(0)T`

B

`480 mu_(0)T`

C

`420mu_(0)T`

D

`mu_(0)`

Text Solution

Verified by Experts

The correct Answer is:
3
`B=B_(1)~B_(2)`
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