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How many electrons would have to be remo...

How many electrons would have to be removed from a copper penny to leave it with a positive charge of `10^(-7) C` ?

A

`6.25xx10^(-11)`

B

`6.25xx10^(-12)`

C

`6.25xx10^(11)`

D

`6.25xx10^(13)`

Text Solution

Verified by Experts

The correct Answer is:
C
According to quantisation of charge , q = ne
q= ne
`n=(q)/(e)=(1xx10^(-7))/(1.6xx10^(-19))=6.25xx10^(11)`
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