A current of `0.1 A` circulates around a coil of 100 turns and having a radius equal to `5 cm`. The magnetic field set up at the

A current of `0.1 A` circulates around a coil of 100 turns and having a radius equal to `5 cm`. The magnetic field set up at the centre of the coil is
(`mu_(0)=4pixx10^(-7)` weber/amper-metre)
A. `4pi xx1-^-5`tesla
B. `8pixx10^-7` tesla
C. `4xx10^-5` tesla
D. `2xx10^-5` tesla

A current of `0.1 A` circulates around a coil of 100 turns and having a radius equal to `5 cm`. The magnetic field set up at the centre of the coil is

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