Question

Answer the following questions from figure:

1. With reference to point B, potential energy of how much water reservoir in the dam will be converted into kinetic energy?
2. What will be the effect on electricity generation, if the channel taking water to turbine starts at point A?
3. What will be the effect on electricity generation, if the channel taking water to turbine starts at point C?

Answer 1

1.  When the sluice gate at point B is opened, the water from reservoir will start flowing. potential energy of the stored water will become kinetic energy of the quantity of water that is let out through the sluice gates. 
2. If the channel taking water to turbine starts at point A, then the water will flow with a greater speed. Since point A is at height, water will acquire speed. This will result into more efficient rotation of the blades of turbine. The electricity generation will thus become more efficient.
3. If the channel taking water to turbine starts at point C, it will affect the electricity generation adversely. Point C is on the lower height as compared to the channel that carries water to the turbine.