A circular conducting ring is placed coaxially around the top end of a long solenoid
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A circular conducting ring is placed coaxially around the top end of a long solenoid. The current in the solenoid is clockwise when viewed from above. (i) It is increased steadily from zero to a certain value, and (ii) later decreased steadily back to zero. As seen from above, the directions of the induced currents I1 and I2 in the ring during intervals (i) and (ii) respectively are
(a) clockwise,anticlockwise
(b) anticlockwise,clockwise
(c) clockwise,clockwise
(d) anticlockwise,anticlockwise