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Current Electricity
Question
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It is possible to generate a 1,00,000 volt potential difference by rubbing a pocket comb with wool. Why is this voltage not dangerous when the much lower voltage provided by ordinary electric outlet is very dangerous?

Answer

Power is given by, 
                          P= I2R
The pocket comb is an insulator with extremely high resistance. Hence, the current flowing across the comb is very small. Consequently, power is small. 

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