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What will be the power......... Rest in image |
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Answer» 1 ML = 10⁻⁶ m³Hence 80 ml = 80 × 10⁻⁶ m³Pressure = 100 mm of HgBut we must have the Pressure in Pascals.760mm of Hg = 1.01 × 10⁵ PA⇒ 100 mm of Hg = 1.01 × 10⁵ Pa / 760 = 132.89 PaNow we know that Power = Work Done / TimeWork Done = Pressure × Change in Volume⇒ Work Done = 132.89 Pa × 80 × 10⁻⁶ m³⇒ Work Done = 10631.2 × 10⁻⁶ JTime = 60 sec / 60 sec = 1⇒ Power = 10631.2 × 10⁻⁶ J = 1.06 W Since there is no such option, we TAKE the closer value of 1.07 W as the answer.Option (A) is correct.Thanks !! |
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