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An infinitely long straight conductor ca...

An infinitely long straight conductor carries a current of `100A`. At what distance from the conductor is the magnetic field caused by the current equal to `0.5xx10^-4T`?

Text Solution

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Here, `I=100A, a=?, B=0.5xx10^-4T`
As, `B=(mu_0)/(4pi)(2I)/(a)` or `a=(mu_0)/(4pi)(2I)/(B)=(10^-7xx2xx100)/(0.5xx10^-4)=0.4m`
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