Magnet Through Coil Generates Voltage
Meter deflects only while magnet is moving.
Teaching & key ideas
What you do: Move magnet into/out of coil at different speeds.
What students see: Meter deflects only while magnet is moving.
Why it works: Changing magnetic flux induces voltage in the coil.
Question to ask: Why is there no signal when the magnet sits still?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why is there no signal when the magnet sits still?