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Question

(a) Why must the plastic or rubber coverings from the ends of wires be removed before making connections? What is the covering called?
(b) Explain why workers of the electricity department wear rubber gloves when they work on the electric poles?


Solution

(a) Plastic or rubber coverings are called insulation because they prevent the ends of wire to come in contact with each other. Before making a connection, these insulations are needed to be removed to complete the circuit.

(b) Rubber is an insulator. In other words, rubber does not allow electricity to pass through it. Workers of the electricity department wear rubber gloves so that they do not get an electric shock while working on electric cables.

Science
Active Science
Standard VI

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