A long horizontal overhead high tension ...

A long horizontal overhead high tension wire, fixed in east-west direction carries a current 60A. What is the magnetic field at a point 3 m just below the power line? `[mu_0 = 4pi xx 10^-7 SI` units

`3 xx 10^-6 T`

`5 xx 10^-6 T`

`2 xx 10^-6 T`

`4 xx 10^-6 T`

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