NEET Class neet Answered
A water pump of 1 horse power is required to flow water through a cylindrical pipe line at 1 m/s. If flow rate of water is to be doubled then the power of new water pump required is
![question image](http://images.topperlearning.com/topper/new-ate/top_mob168277766696917831420230429_193854.jpg)
Asked by natwarnatwar7 | 29 Apr, 2023, 19:44: PM
Energy of flowing liquid per unit volume is given as
![begin mathsize 14px style E space equals space P space plus space 1 half rho u squared plus space rho g h end style](https://images.topperlearning.com/topper/tinymce/cache/0cb0966840d9f4680bccdc8ceeee7823.png)
First term is pressure , second term is kinetic energy and third term is potential energy.
If pressure and potential energy remains constant , then Energy is proportional to speed u of flow of water.
If speed is doubled , then energy will become four times.
Hence required power of motor becomes four times of initial power.
Hence power of new water pump = 4 HP
Answered by Thiyagarajan K | 02 May, 2023, 10:47: AM
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