Question

Consider the arrangement shown in figure in which the north pole of a magnet is moved away from a thick conducting loop containing capacitor. Then excess positive charge will arrive on

• A. Plate a
• B. Plate b
• C. N both plates a and b
• D. On neither a nor b plates

Answer 1

Answer: (B)

Plate b

Answer 2

When north pole of the magnet is moved away, then south pole is induced on the face of the loop in front of the magnet i.e. as seen from the magnet side, a clockwise induced current flows in the loop. This makes free electrons to move in opposite i.e. direction, to plate b to a inside the loop. Thus excess positive charge appear on plate b.