What is the equivalent resistance when three resistors of , , and are connected in parallel across an electrical circuit?
Answer and explanation
Correct answer: A.
- Step 1: Apply the parallel resistance reciprocal formula: .
- Step 2: Calculate: . Taking the reciprocal gives . Note that equivalent parallel resistance is always smaller than the smallest individual resistor ().
Answer
.
Why not the others: '' is the series resistance (); '' is the largest single resistor; '' is the smallest single resistor.
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