Q: How much negative charge has been removed from a positively charged electroscope if it has a charge of 7.5x10-11C?
Ans: Quantization rule of charges we know:
q=ne
n=q/e
by putting values
n=7.5 × 10-11/1.6 × 10-19
=4.69 × 108
4.69 × 108 charges have been removed.
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