Sometime, a crackling sound is heard while taking off sweater during winters. Explain.

 

Answer

A sweater is made up of wool. 

When we take off a woollen sweater, it rubs against our body or the shirt we are wearing.

This rubbing produces opoosite electric charges

Thus, the discharge of these electric charges produces a crackling sound

  1. Class 8
  2. Chapter 15 Class 8 - Some Natural Phenomena

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.