. A 2-V cell is connected to a 1-12 resistor. How many
electrons come out of the negative terminal of the
cell in 2 minutes?
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Answer:
According to Ohm’s law, the current in the circuit would be:
I = V/R =2/1 = 1 A
The amount of charge transferred when the current flows for 2 minutes is given as ,
Q = I*t = 2 * 2 * 60s = 240C
Total number of electrons coming out of the battery/cell would be,
n= 240 * 6.242×10^18 = 14.98 * 10^20 electrons
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