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If 10 9 electrons move out of a body to one another body every second . how much time is required to get a total charge of 1 C on the other body- it is an eg from the ncert from first chapter. but I cant understand the answer given by ncert?

If 109 electrons move out of a body to one another body every second . how much time is required to get a total charge of 1 C on the other body- it is an eg from the ncert from first chapter. but I cant understand the answer given by ncert? 

Grade:12

1 Answers

Arun
25758 Points
2 years ago
We know that 1 Coulomb = 6.242×1018 eletrons
 
given 10^9 electrons take 1 secs
 
=> 10^9 electrons ------> 1 sec
 
=> 1 electrons ---------> 1/(10^9) secs
 
=> 6.242×1018 ------> 6.242×1018/ (10^9)
 
= 6.242×109 secs = 6.242×109/ (60*60*24*365)  years
 
=197.93 years
 
 

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