Advertisements
Advertisements
Question
State two advantages and two disadvantages of using hydro-energy for producing electricity.
Advertisements
Solution
Advantages:
(i) When electricity is generated, no greenhouse gases are made.
(ii) It is an inexhaustible source of energy.
Disadvantages:
(i) The dam is expensive to build.
(ii) By building a dam, the nearby area has to be flooded and this could affect nearby wildlife and Plants.
RELATED QUESTIONS
Fill in the blank
The energy possessed by a body due to its position is called ________ energy.
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
Name the type of energy (kinetic or potential) possessed by the following:
A moving bus.
What is solar energy?
A pebble is thrown up. It goes to a height and then comes back on the ground. State the different changes in form of energy during its motion.
Is it possible that a body may possess energy even when it is not in motion?
Give one example when:
Electric energy changes to mechanical energy.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
Obtain an expression for the kinetic energy of a body of mass m moving with a velocity v?
