A polythene piece rubbed with silk is found to have a negative charge of ` 4 xx 10^(-8)` C, then the transferred electrons will be

Options

A. ` 25 xx 10^(10)`
B. ` 1.875 xx 10 ^(-12)`
C. ` 4 xx 10 ^(-12)`
D. ` 895 xx 10^(-5) `

Answer

A

Explanation

` therefore q= n e rArr n = (q)/(e) = ( -4 xx 10 ^(-8))/(1.6 xx 10 ^(-19)) = 25 xx 10 ^(10)`