A) when fuel is poured in the bottle.
B) when cycle is in motion.
C) when it is mounted properly.
D) when wind blows.
Correct Answer: B
Solution :
Option [b] is correct Explanation: Bottle generator is also known as sidewall generator since it operates using a roller placed on the sidewall of bicycle tyre. When the bicycle is in motion the dynamo roller is engaged and electricity is generated as the tyre spins the roller.
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