Question

Two conducting circular loops F and G are kept in a plane on either side of a straight current-carrying wire as shown in the figure below.
If the current in the wire decreases in magnitude, the induced current in the loops will be

• A. clockwise in F and clockwise in G.
• B. anti-clockwise in F and clockwise in G.
• C. clockwise in F and anti-clockwise in G.
• D. anti-clockwise in F and anti-clockwise in G.

Answer 1

The correct option is B anti-clockwise in F and clockwise in G.

The magnetic field above the wire is out of the plane. This flux is decreasing and should be compensated by the current in the loop F and so the current in loop F will be anti-clockwise. For loop G the situation is opposite