SSC JE Electrical Engineering 26 Sep 2019 Shift 2 Paper

Question : 165 of 200

Marks: +1, -0

A long straight wire carries a current I = 10A. At what distance is the magnetic field H = 1 A/m?

Solution:

I = 10A

d = ?

H = {1A}/ m

H = I/ {2π r}

where ‘r’ is distance.
∴

r =I/{2π H}

10/{2×π×1}

10/{2π}

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