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Two concentric coils each of radius equa...

Two concentric coils each of radius equal to `2pi` cm are placed at right angles to each other. If 3A and 4A are the currents flowing through the two coils respectively. The magnetic induction (in `Wb m^(-2)` at the centre of the coils will be:

A

`5 xx10^(-5)`

B

`12 xx 10^(-5)`

C

`7 xx 10^(-5)`

D

`10^(-5)`

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