question_answer

A magnet makes a single pass through a coil. Then, across the ends of the coil it produces

A)  DC voltage         

B)  Sinusoidal voltage

C)  Single voltage pulse

D)  Two voltage pulses

Correct Answer: D

Solution :

Consider a magnet approaching a coil. The front face of the coil-facing the North pole will behave as North pole anti-clockwise current flows in the coil. When the coil moves away The face in front of South Pole of the magnet behaves as North pole. Clockwise current flows in the coil. They during the single pan of the magnet two voltages pulses are induced.