1.

If a charge on the body is 1 nC, then how many electrons are present on the body ?

Answer»

`1.6 xx 10^(19)`
`6.25 xx 10^(9)`
`6.25 xx 10^(27)`
`6.25 xx 10^(28)`

Solution :`Q = n e rArr n = (q)/(e) = (1xx 10^(-9))/(1.6 xx 10^(-19)) = 6.25 xx 10^(+9)`


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