A 2V cell is connected to A 1 ohm resistor. how many electron come out of the negative terminal of the cell in 2 minutes
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A 2V cell is connected to A 1 ohm resistor. how many electron come out of the negative terminal of the cell in 2 minutes
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Answer:
7.5 x 10^20 electrons
Explanation:
t = 2 min = 120 sec.
V = IR from ohm's law
I = V/R = 2/1 = 1 Ampere
I = Q/t
=> ne/t = I
=> n = It/e = 1 x 120 / 1.6 x 10^-19
=> n = 7.5 x 10^20
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