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Introduction to Electricity

Why do signs ...

Question

Why do signs at petrol stations warn people not to use their cell phones while filling petrol in their cars?

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Solution

All mobiles are wireless devices transmit and receive electromagnetic waves. These electromagnetic waves can induce current and generate an electric spark in metal conductors. This can be hazardous near a petrol pump. This is why mobile phones are recommended to be switched off in petrol pumps.

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