Question

The figure shows a long straight wire carrying a current $I_1$ along the axis of a circular ring carrying a current $I_2$.Identify the correct statement.

• A. Straight wire attracts the ring
• B. Straight wire attracts a small element of the ring
• C. Straight wire does not attract any small element of the ring
• D. None of the above

Answer 1

Answer: (C)

Straight wire does not attract any small element of the ring

$I_1$ produces circular magnetic lines current $I_2$ is each small circular element is parallel to $(\theta =0^o)$ magnetic field. Hence, force is zero.