Multiple choice

Which of the following is not present in triboelectric series?

  1. Human hair

  2. Cotton

  3. Polythene

  4. Paper and pencil

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

4th option is not present as pencil is not present although paper is present in the triboelectric series. Option (1), (2) and (3) are present in the triboelectric  series.