Series/Parallel Circuits: Four resistors having resistances of 20 ?, 40 ?, 60 ?, and 80 ? are connected in series across an ideal 50-V dc source. What is the current through each resistor?
A. 0.25 A
B. 0.50 A
C. 0.75 A
D. 2.0 A
E. 4.0 A
Answer: A
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