A straight wire of diameter $0.5 \mathrm{~mm}$ carrying a current of $1 \mathrm{~A}$ is replaced by another wire of $1 \mathrm{~mm}$ diameter carrying same current. The strength of magnetic field far away is

Question

A straight wire of diameter $0.5 \mathrm{~mm}$ carrying a current of $1 \mathrm{~A}$ is replaced by another wire of $1 \mathrm{~mm}$ diameter carrying same current. The strength of magnetic field far away is, twice the earlier value, same as the earlier value, one-half of the earlier value, one-quarter of the earlier value

MARKS App · Accepted Answer

The current is same in both the wire, hence magnetic field induced will be same.

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