EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Why are electrical cords covered in plastic or rubber?
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Because plastic and rubber are insulators which keeps us safe
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because it looks nicer
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because all wires must have plastic or rubber
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because they won’t melt
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Explanation:
Detailed explanation-1: -Electric wires used in homes generally have a plastic or rubber covering so as to prevent shocks when we touch them. Our body can conduct electricity, so when we hold the current-carrying wire without any covering, the current flows through our body which gives us a shock.
Detailed explanation-2: -Polyvinyl chloride and rubber are examples of insulators. They do not allow an electric current to pass through them, therefore even if we come into contact with the wires, we will not be shocked because the current will not pass through our bodies.
Detailed explanation-3: -Plastic is an insulator. It resists the flow of electricity, so used for making outer covering of electrical wires.
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