One end of resistor A is connected to the positive terminal of a battery and the other end is connected to resistor B. The opposite end of resistor B is connected to the negative terminal of the battery. If resistor A has resistance R and B has a resistance 2R, what is the equivalent resistance of this circuit?
a) R
b) 3R/2
c) 2R
d) 2R/3
e) 3R
Ans: e) 3R
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