Answer
a) No current
b) No current
c) No current
d) No current
Work Step by Step
The upper loop will have no current at the following times:
(a) Before the switch is closed, there will be no current flowing in either loop, so the upper loop will have no current.
(b) Immediately after the switch is closed, a current may begin to flow in the lower loop, but the upper loop will not be connected to the power source, so it will not have a current.
(c) Long after the switch is closed, the upper loop will still not have a current unless it is connected to the power source or is otherwise induced to have a current, such as through electromagnetic induction.
(d) Immediately after the switch is reopened, the current in the lower loop will be interrupted, and the upper loop will again have no current.
It is not possible to determine the direction of the current in the lower loop without more information about the direction of the current in the power source and the orientation of the loops relative to the power source and each other.
