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The electrical appliances are connected to the mains power supply. The high potential difference between the line and neutral points can be damaging to human beings.  The current caused by the potential difference will create a shock in our body and can burn due to the heat produced.  If the body of theappliance is not properly shielded from the line, then leakage can pass through our body and enormous amount of heat is generated.  one faces the impact of electric charge (force) from the line. we cannot bear that.

The equipment has a resistance. When current passes through that, it gets heated up. Like engine of motor cycle. or geyser.
So the heat can burn our skin.

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wet hand means water in hand and as we know that water Is a good conductor of electricity which means if touch electric switches with wet we may get SHOCK.


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