Multiple choice

Why is electrical wiring usually covered with a layer of plastic?

  1. To make it look pretty

  2. To make it safe

  3. To help electricity flow along the wire

  4. To show which is negative and which is positive
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plastic is an electrical insulator. Covering wires with plastic prevents accidental contact with the live metal, protecting users from electric shocks.

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