Circuit
How many electrons pass a given point in the circuit in 2 min?
The potential difference in a simple circuit is 15 V and the resistance is 20 ohms.
What current I flows in the circuit? Answer in units of A.
I know the the current is .75 amps, but what does this question asking for and how do you do it?
How many electrons pass a given point in the circuit in 2 min?
An amp is a coulomb per second. A coulomb is 6.023×10^23 electrons. The number of electrons in 2 minutes would be:
.75A x 6.023×10^23 electrons/A/sec x 2 minutes x 60 sec/min = 5.4×10^25
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