How many electrons pass through a 20-W resistor in 10 min if there is a potential drop of 30 volts across it?
a. 5.6 × 10^21
b. 7.5 × 10^21
c. 9.4 × 10^21
d. 1.1 × 10^21
e. 3.8 × 10^21
A
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