A long straight wire is in the plane of a rectangular conducting loop of wire. The straight wire carries a constant current I as shown in the figure below and is moved towards the rectangular loop. While the wire is being moved towards the rectangular loop, the current in the loop \_\_\_\_\_\_.
Ais always zero
Bflows clockwise around the loop
Cflows counterclockwise around the loop正確答案
Dalternates, first one way then the opposite way around the loop
答案與詳解
