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What is the effective resistance (in ) of two resistors 20...

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What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?

Answer & Solution
Correct Answer: Option B
according to rules 1/R = 1/R1 + 1/R2 (for parallel) =1/20 + 1/30 =12 ohm
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