Question

A straight current carrying conductor is kept along the axis of circular loop carrying current. The force exerted by the straight conductor on the loop is:

• A. Perpendicular to the plane of the loop
• B. Zero
• C. In the plane of the loop, away from the centre
• D. In the plane of the loop, towards the centre

Answer 1

The correct option is B Zero

Given

A straight current carrying wire is placed on the axis of circular loop carrying current

Solution

Force of one conductor on other is iLBsin$\theta$

Here Magnetic field of straight wire is in same direction as of length of circular loop.

Therefore$sin\theta =sin0=0$

F=0

The correct option is B