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A charge on electron is 1.6 xx 10^(-19) ...

A charge on electron is `1.6 xx 10^(-19)` C. How many electrons will be passing in 2 seconds through a cross-section of a conducting wire carrying 0.7 A electric current ?

A

4.4 `xx 10^(18)`

B

`4.4 xx 10^(-18)`

C

`8.8 xx 10^(18)`

D

`8.8 xx 10^(-18)`

Text Solution

Verified by Experts

The correct Answer is:
C
`8.8 xx 10^(18)`
`I = (Q)/(t) = ("ne")/(t)`
` therefore n = (I t)/(e) = (0.7 xx 2)/(1.6 xx 10^(-19)) = 0.875 xx 10^(19)`
`therefore n approx 8.8 xx 10^(18)`
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