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

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo