STANDARDPhysics-Work, Energy and Power
STANDARD Physics Power MCQ Question
Type: MCQ-numerical-Medium-Class 11
A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m³ in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump? (Take g = 10 m s⁻²)
A
36.5 kW
B
44.4 kW
C
52.5 kW
D
60.5 kW
Correct Answer
Option B
Detailed Explanation
The power consumed by the pump is calculated using the formula P_input = (P_output / η). The mass of water pumped is 3 × 10⁴ kg. Using the given efficiency and height, the power input is calculated to be 44.4 kW.
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