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A man fixes outside his house one evenin...

A man fixes outside his house one evening a 2m high insulating slab carrying on its top a large aluminium sheet of area 1 `m^(2)`. Will he get an electric shock, if he touches the metal sheet next morning?

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Yes, the man will get the shock. As the aluminium sheet is placed on the insulating slab and that is placed on the ground. The aluminium sheet, dielectric slab and the surface of earth will form a capacitor. There are steady discharging currents in the atmosphere due to which the aluminium sheet will get charged and this will raise its electric potential. The extent of rise in electric potential is dependent on the capacitance of the capacitor formed by the aluminium sheet, slab and the ground. As the man touches the sheet, the charge on the sheet will flow to the earth through the man.s body.
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