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Physics 21
Why we should not touch electrical appliances with wet hands?
The reason is that water is a good conductor of electricity. If there is a small current leak in the appliance your wet hands increase your conductivity to the appliance up to a point where you might feel an electric shock. Dry hands have a high resistivity, whereas wet hands do not, the resistance is much lower.
Hence, this is all about resistance. Where wet hands have lower resistance and current will be able to pass through easier, and dry hands have higher resistance, resisting current that tries to pass through.
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