NCERT Exercise 1.11 - Electric Charges and Fields
Question: A polythene piece rubbed with wool is found to have a negative charge of 3 × 10⁻⁷ C. (a) Estimate the number of electrons transferred (from which to which?) (b) Is there a transfer of mass from wool to polythene?
Answer: (a) Number of electrons transferred = **1.88 × 10¹²** electrons, transferred **from wool to polythene** (polythene becomes negatively charged). (b) Yes, there IS a transfer of mass. Electrons have ...
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