How are 500 ω resistors connected so as to give an effective resistance of 750 ω ?
A. Three resistors of 500 ω each, in parallel
B. Three resistors of 500 ω each, in series.
C. Two resistors of 500 ω each, in parallel.
D. Two resistors of 500 ω each, in parallel and the combination in series with another 500 ω resistor.
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Answer: D
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