Explain why, sometimes when we take off the woollen sweater or a polyester shirt in a dark room, we can see tiny sparks of light and hear a crackling sound.
ScienceClass 8ICSEAnswered 28 Mar 2026
Answer
The sweater or a polyester shirt gets charged due to friction between the sweater and the body. That is why we can see tiny sparks of light and crackling sound when we take off a woollen sweater or
polyester cloth.
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