Question

If 10⁹ electrons move out of a body to another body every second, how much time is approximately required to get a total charge of 1C on the other body?

पर्याय

• 120 years

• 180 years

• 220 years

• 200 years

Answer 1

200 years

Explanation:

We know that 1 Coulomb = 6.242×10¹⁸ electrons 

Given: 10⁹ electrons takes 1 sec

`=> 1 "electrons" -> 1/10^9`sec

`=> 6.242 xx 10^18 -> (6.242 xx 10^18)/10^9`sec

Now,

`6.242 xx 10^9 "sec" = (6.242 xx 10^9)/(60 xx 60 xx 24 xx 365)`years

= 197.93 years

= 200 years approx