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A wire 5m above the ground through which...

A wire 5m above the ground through which 50A current is flowing from south to north. Find the direction and magnitude of magnetic field directly below the cable.

Text Solution

Verified by Experts

`r = 5 cm `
`I = 50 A`
(from south to north)
`B = ?`
` B = (mu_0)/(4pi) (2I)/r = 10^(-7) xx (2 xx 50)/(5)`
`= 2 xx 10^(-6) T`
According to Right Hand Thumb Rule, magnetic field is directed from east to west.
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