magnet of the receiver alternating emfs of varying amplitudes, frequencies, and waveforms. The coils of ... QUESTIONS AND PROBLEMS 1. In what ... Does the induced current aid or hinder the motion that produces it? State the law that underlies your answer. 4. Magnet M is moved away from coil A and toward coil B. Label ... A flux of 60, 000 lines is encircled by a closed wire loop composed of 20 turns.