Question

Calculate the number of electrons that passes through a circuit when 25A current flows for 2 hours.

Answer 1

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Given:-

Current in circuit = I = 0.4 A

Time the current flowed = t = 2 hours

= 3600 sec

Hence,

Elections flown =

$\bold{ = > Q = It} \\ = > \bold{Q }=25 \times 3600 \\ = >\bold{ Q} = \boxed{90,000\:C}$

___________

Hence, shown.

Answer 2

Answer:

Explanation:

Current, I = 25 A

Hence, charge passing per minute, Q = It = 25×60 = 1500C

And charge on one electron = e = 1.6×$10^{-19}$

Hence, the Number of electron = N = eQ = 1.6×$10^{-19}$ x 1500 = 240 x $10^{-19}$