Question

The figure shows a long straigh wire carryhing 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 these

Answer 1

Correct Answer - C
`I_1` produce circular magnetic lines current `I_2` is each small circular element is parallel to `(theta=0^@)` magnetic field. Hence, force is zero.