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G5C04
What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?
Pick an answer to check it.
Answer: D. 67 ohms
For two parallel resistors, R = (R1 x R2) / (R1 + R2) = (100 x 200) / 300 = 20,000 / 300 = 67 ohms.
Tip: Two in parallel: product over sum.