Multiple Choice Questions on If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V then ........ for PCS Exam Preparation

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Multiple Choice Questions

If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V then ........

Everyday Science (PCS) Physics
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    If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then

    R1 < R2

    Incorrect Answer

    R2 < R1

    Correct Answer

    R1 = R2

    Incorrect Answer

    R1 ≥ R2

    Incorrect Answer
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    Explanation:

    Using power, P = V2/R or R = V2/P
    For the same voltage, R ∝ 1/P
    More the power, lesser the resistance.
    Accordingly, R2 < R1

    By: Ruchika
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