119Sir, what does efficiency mean??
Water is to be pumped to fill a tank of volume 30 kL at a height of 40m from the ground in 15 mins by a pump on the ground floor.What is the electric power consumed by the water pump?Efficiency of pump=30%.. Density of water=1000kg/m3 and g=9.8m/s2.
Please give the explanation.
Thanks in advance
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2 Answers
156Here the main concept is that you are doing work to raise water to the height of 40m from the ground.
And power = (work or energy)/time
How much time it will take to fill up the tank is given.
Now to calculate the work, you need to calculate the change of potential energy for water.
If ground is taken as zero, then the change at a height h=40m will be mgh (m=mass of water=density*volume).
Solve the question and post the solution now :)