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

 Electricity wires carry the current along their path. They need to be covered with such materials, which do not allow the current to pass thorough to avoid any accident when touched. The material thus used for this purpose should be a bad conductor of electricity. As plastic is a bad conductor of electricity therefore, it is used for the same purpose. 

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