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Why is a generator armature more difficult to rotate when it is connected to and supplying electric current?

1. Why is a generator armature more difficult to rotate when it is connected to and supplying electric current to a circuit. 2. Some bicycles have electric generators that are made to turn when the bike wheel turns. These generators provide energy for the bike’s lamp. Will a cyclist coast farther if the lamp connected to the generator is turned off?

Public Comments

1. 1. Because the generator is pulling energy from the mechanical motion and changing it into electrical energy. It can only do this when there is an electrical load connected. When I was in electrical engineering school, I found this very surprising - we had a hand crank generator that you could connect loads to. It really made me understand. 2. Yes - from long experience I can tell you the cyclist can feel the drag of the generator.