Example 1 · difficulty 2/5
Two coaxial conducting loops face each other. Viewed from the secondary-loop side, the primary current is clockwise and produces an into-page flux through the secondary. A switch in the primary is opened, causing this flux to decrease. What is the transient current in the secondary as viewed from the same side?
- A. Counterclockwise, to oppose the original current
- B. Clockwise, to reinforce the declining into-page flux
- C. No current, because the primary circuit is open
- D. An alternating current of continuously changing direction