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Subject - Physics:

Basics

MCQ - 119-10586

Question:

Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much power is generated by the turbine? (g = 10 ms–2)?

  1. 7.0 kW
  2. 8.1 kW
  3. 10.2 kW
  4. 8.1 kW

Correct Answer: B

Explanation:

The input power to the turbine is the potential energy due to the water falling per second and is equal to mgh = 15×10×60 =9000 watt.
The power generated by the turbine is 10 % less than the above value and is equal to (9000 – 900) watt = 8100 watt = 8.1 kW.

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346 MCQ for effective preparation of the test of Basics of Physics section.

Read the MCQ statement: Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10 % of energy. How much power .... ? (g = 10 ms–2)? , keenly and apply the method you have learn through the video lessons for Basics to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 119-10586.

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