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A long straight wire in the horizontal p...

A long straight wire in the horizontal plane carries a current of 50A in north to south direction. Give the magnitude and direction of `vecB` at a point 2.5 m east of the wire.

Text Solution

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Here `I = 50 A and R = 2.5 m`
`:.` Magnitude of magnetic field
`B = (mu_0 I)/(2 pi R) = (4 pi xx 10^(-7) xx 50)/(2 pi xx 2.5) = 4 xx 10^(-6) T`.
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