Question

A current of 5A is passing throygh a wire . How many electrons are passing per minute through any cross section of wire?

Answer 1

given ,
   I = 5 A 
   t = 1 × 60 = 60 sec 
   charge of one electron = e = 1.6 × $10^{- 19}$
   n = ?

I = Q/t , but Q = ne 
∴ I = ne/t
5 = n × 1.6 × $10^{-19}$ / 60

5 × 60 /1.6 × $10^{-19}$ = n
5 × 60 × $10^{19}$ / 1.6 = n
                  = 1875 × $10^{18}$ electrons