A straight wire carrying a current 10 A ...

A straight wire carrying a current `10 A` is bent into a semicircular arc of radius `5 cm`. The magnitude of magnetic field at the center is

`1.5xx10^(-5)T`

`3.14xx10^(-5)T`

`6.28xx10^(-5)T`

`19.6xx10^(-5)T`

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