The lights on a bicycle are supplied by a basic electrical generator. A permanent magnet turns around a fixed coil of wire wrapped on an iron core. Which statement is correct?
- AThe current in the lamps decreases as the speed of rotation increases.
- BThe current in the lamps decreases when the magnet is replaced by a stronger magnet.
- CThe output electromotive force (e.m.f.) will be higher if the gap between the magnet and the coil is bigger.
- DThe output e.m.f. will be higher if there are more turns on the coil.