Multiple choice

Why do electric wires have a plastic covering?

  1. Because plastics are good conductor of heat.

  2. Because plastics are good conductor of electricity.

  3. Because plastics are bad conductor of electricity.

  4. Because plastics are bad conductor of heat.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electric wires have plastic covering because plastics are excellent electrical insulators (bad conductors of electricity). This prevents short circuits and protects against electric shock. While plastics are also bad heat conductors, the primary purpose of wire insulation is electrical safety.

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