Question:
How many electrons must be removed from a piece of metal to give it a positive charge of 1 × 10 to the power -7 C
Answer:
Removal of one electron from the metal piece means the presence of charge +1.6×10-19 C
So, number of electrons to develope the charge of +1×10-7 C on metal piece is-
= +1×10-7 /+1.6×10-19
= 0.625×1012 =6.25×1011
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