Why does one remove the plastic coating of the electrical wire from the ends, before connecting it to the electric circuit?
We remove the plastic coating from ends of an electric wire while using it for connections in an electric circuit because plastics are bad conductor or insulator of electricity due to which it prevents us from electric shocks. To complete the circuit, we have to remove the plastic coating to connect the metal wires (copper, aluminium), so that the current may flow through the circuit.
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