Question 4
Why does a bicycle lamp get brighter when you ride faster?
The right answer is the one marked above.
The magnet spins faster, so the field changes faster and the emf is larger. The induced emf follows the rate of change of the field.
Lesson: Chapter 13 — Electromagnetism and electromagnetic induction
The microphone and the bicycle dynamo
4 of 4
Clear all your answers?
This erases every answer in this set and starts you again at question one. Your score will be gone.
Type these four numbers to confirm:
Those numbers don't match. Look at them again and type them.
This browser is not saving your answers, so no total can be shown.
Answer the question to continue.