A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
A. two revolutions
B. one revolution
C. half revolution
D. one-fourth revolution
Answer:C
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
A. two revolutions B. one revolution C. half revolution D. one-fourth revolution