When you walk across a carpet, you become negatively charged. why do you receive a shock when you touch a metal door handle?

because the door is metal and metal conducts electricity well

Since, due to rubbing from the carpet, your body gets negatively charged due to flow of electrons from the carpet to your body and when you touch the metal conductor, due to difference in charges, the electrons will instantaneously start to flow from your body to the metal conductor.

Explanation:

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