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A long straight wire carries a current o...

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire ?

Text Solution

Verified by Experts

Here, I=35 A and r=20 cm =0.2 m
The wire is along and it is considered as an infinite length wire. The magnetic field
`B=(mu_(0))/(4pi). (2I)/(r )=(10^(-7)xx2xx35)/(0.2)=3.5xx10^(-5)T`
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