First slide
Electrical power
Question

Statement 1: Electric appliances with metallic body, e.g. heaters, presses etc, have three pin connections, whereas an electric bulb has a two pin connection.

Statement 2: Three pin connections reduces heating of connecting cables.

Easy
Solution

The electrical appliances with metallic body like heater, press etc. have three pin connections. Two pins are for supply line and third pin is for earth connection for safety purposes.

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