Question

A current of 0.5A passes through a conductor for 2s. How many electrons flow through any cross section of the conductor during this interval?

Answer 1

Given:
I = 0.5 A  ;  t = 2 s

Solution:
Q (charge) = I / t
Q = 0.5 / 2 = 0.25
                                         Total charge
                                _____________________
No. of electron =                                                     [ n (e) = Q / e ]
                                  Charge of one electron

n (e) = 0.25 / 1.602 x $10^{-19}$
n (e) = 0.25 x $10^{19}$ / 1.602 = 1.5605493 x $10^{18}$

Thus, there are 1.56 (1.5605493) x $10^{18}$ electrons flowing in 0.5 A current in 2 s. 

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Answer 2

Explanation:

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