1.

For a long cylindrical wire of uniform cross section of radius R, find proportionality between r and B. Given r<<R.(a) B ∝ r(b) B ∝ 1/r(c) B ∝ r2(d) B ∝ 1/r2

Answer»

Correct option is (a) B ∝ r

\(B=\frac{\mu_{0}}{2\pi},\frac{ir}{R^2}\)

B ∝ r



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