What is the equivalent resistance of a 12 ohm and a 4 ohm resistor connected in parallel?
Answer and explanation
Correct answer: C. 3 ohms
- Step 1: For two resistors in parallel, R = (R1 x R2) / (R1 + R2). Step 2. (12 x 4) / (12 + 4) = 3 ohms. Answer: 3 ohms. Why not the others: 16 ohms: this is the series combination. 8 ohms: this averages the resistances. 48 ohms: this does not divide by the sum.
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