Two 20-ohm resistors are connected in parallel. What is the equivalent resistance?
Answer and explanation
Correct answer: D. 10 ohms
- Step 1: For parallel resistors 1/R = 1/20 + 1/20 = 2/20. Step 2. R = 10 ohms. Answer: 10 ohms. Why not the others: 40 ohms is the series value; parallel always gives less than the smallest branch.
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