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