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  4. How many electrons must be removed from a piece of metal to give it a positive charge of 1 × 10-7 C ?

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Q. How many electrons must be removed from a piece of metal to give it a positive charge of $1 \times 10^{-7} C$ ?

Electric Charges and Fields

Solution:

Correct answer is (b) $6.25 \times 10^{-12}$