Two resistors of resistance R and 2R connected in parallel in an electric circuit. Calculate the ratio of electric power consumed by R and 2R.
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In parallel combination in voltage remain same that is the potential difference across the two points remains same.
Therefore,
P:P' = V²/R:V²R'
=>P:P' = 2R:2 = 2:1.
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Therefore,
P:P' = V²/R:V²R'
=>P:P' = 2R:2 = 2:1.
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Power is inversely proportional to resistance for equal potential difference
Ans : (b)
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