Explain the advantages and disadvantages of a dynamo compared with batteries for bicycle lights

Answers

Advantages.

1. Dynamos have no running cost. That means one bought they do not any running cost.

2. The power from the dynamo do not run out. As long as the bicycle is moving there will be enough lighting.

3. It environmental friendly. Dynamo do not use toxic chemicals to dispose.

Disadvantages

1. There can only be light if the bicycle is moving. Before the rider starts moving there is not light at all.

2. Whenever the speed reduces the light becomes dimmer. This means the rider has to maintain a certain speed for there to be enough light.

3. It require energy from the rider for there to be light. He has to keep on pending to maintain the motion of the bicycle.