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A pump motor is used to deliver water at a certain rate from a given pipe. To obtain twice as much water from the same pipe in same time, power of motor has to be increased: 1. 16 times 2. 4 times 3. 8 times 4. 2 times |
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Answer» 3. 8 times p ∝ (v)3 ∴ If velocity is doubled. Power will become 8 times. |
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