Q 8

A circular metal ring is situated above a long straight wire, as shown in the figure. The straight wire has a current flowing to the right, and the current is increasing in time at a constant rate. Which statement is true?
A) There is an induced current in the metal ring, flowing in a clockwise direction.
B) There is an induced current in the metal ring, flowing in a counter-clockwise direction.
C) There is no induced current in the metal ring because the current in the wire is changing at a constant rate.

Q 10

In the figure, the inner loop carries a clockwise current I that is increasing. The resistor R is in the outer loop and both loops are in the same plane. The induced current through the resistor R is
A) from a to b.
B) from b to a.
C) There is no induced current through the resistor.

Q 11

In the figure, a bar magnet moves away from the solenoid. The induced current through the resistor R is
A) from a to b.
B) from b to a.
C) There is no induced current through the resistor.