The magnetic induction at apoint P which...

The magnetic induction at apoint P which is at the distance 4 cm from a long current carrying wire is `10^(-3) T`. The field of induction at a distance 12 cm from the current will be

`3.33xx10^(-4)T`

`3xx10^(-3)T`

`1.11xx10^(-4)T`

`9xx10^(-3)T`

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