Multiple choice

Overhead cables need not be insulated because

  1. bare wires shine brightly

  2. air is a good conductor of electricity

  3. bare wires conduct electricity better than insulated wires

  4. they are not dangerous due to height

  5. air is a bad conductor of electricity

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

As we know that air is a bad conductor of electricity, so the chances of transmission of electricity are about nil. So, overhead cables need not to be insulated.

Keep practicing — related questions