A uniform wire of length l carrying current radiates energy at a rate P to environment while its temperature remains the same. Magnitude of magnetic flux density on the surface of wire is B and its diameter is d. If electric field strenght in wire is given by `E=(nmu_(0)P)/(Bpild)`, then find n.

Answer

1

Explanation

`P=VI=ElIand B=(mu_(0)I)/(2pir)=(mu_(0)I)/(pid)`
`implies(P)/(El) = (Bpid)/(mu_(0))impliesE=(mu_(0)P)/(Bpild)`