Question

For a cylindrical conductor of radius $a$, which of the following graphs shows a correct relationship of $B$ versus $r$ ?

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

For a cylindrical conductor for $r<a,B\propto r$ and for $r>a,B\propto (1/r).$ So, graph (c) is correct.