Two resistors of 12 ohm and 12 ohm are connected in parallel. What is the equivalent resistance?
Answer and explanation
Correct answer: B. 6 ohm
- Step 1: For parallel resistors, R = R1 R2 / (R1 + R2).
- Step 2: R = 12 x 12 / 24 = 6 ohm.
Answer
6 ohm.
Why not the others: '24 ohm' adds the resistances as if they were in series; '12 ohm' averages the two resistances; '144 ohm' multiplies without dividing by the sum.
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