Hydroelectric Power Station

Q.

What is the principle of the electric generator?

Q.

Write the energy transformation in the following:

In a hydroelectric power plant, ________ energy of water gets converted into ______ energy.

Q.

By making use of the energy of the water stored in dams, ______.

1. the crop output can be increased.
2. the fertility of the land is improved.
3. the magnetic field is generated.
4. electricity can be generated.

Q. Arrange the following in the order of generation in a hydroelectric power station.

1. Water stored in a reservoir
2. The turbine rotates
3. The gates are lifted
4. Water hits the turbine
5. Generator produces electricity

Q.

In a hydroelectric-power plant:

1. electricity is extracted from water.

2. ice is converted into water to produce electricity.

3. potential energy is converted into electricity.

4. kinetic energy possessed by stored water is converted into potential energy.

Q.

Explain the change in energy of falling water in a hydro electric power station.

Q.

Which of the following is not a good option in the generation of electricity in the hydroelectric power plants?

1. Water availability

2. Sedimentation

3. Rocky land

4. Catchment area

Q.

Explain the principle of production of hydroelectricity with the help of labelled diagram.

Q.

Name the energy transformation takes in the following instruments.
IV. Electronic generator

Q.

What form of energy conversion take place in generating hydroelectricity?

Q.

Name the device which converts mechanical energy into electrical energy.

Q.

In a hydroelectric power plant, more electrical power can be generated if the water falls from a greater height, because ____.

1. the electrical energy production decreases with increase in height of the water column

2. more water molecules dissociate into ions

3. its temperature increases

4. larger amount of potential energy is converted into kinetic energy

Q.

What are the advantages of constructing dams on rivers?

Q.

In a hydropower station, a second reservoir is constructed near the region of water outflow ___

1. to control the flow of current as per the requirement of drinking water.

2. to control the flow of water as per our requirement of electricity.

3. to keep the electricity generation constant.

4. when the demand for electricity is high, the water from the lower reservoir is pumped into the main reservoir.