Physics

Problem

A long cylindrical copper wire of radius

2\,\text{cm}

carries a steady current of

20\,\text{A}

uniformly distributed over its cross-section. Find the current enclosed by a circular Amperian path of radius

1\,\text{cm}

coaxial with the wire. a)

20\,\text{A}

10\,\text{A}

5\,\text{A}

2.5\,\text{A}