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प्रश्न
State two advantages of producing electricity from solar energy.
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उत्तर
Advantages of using solar panels:
1. They do not cause any pollution in the environment.
2. Running cost of solar panel is almost zero.
3. They last over a long period of time.
4. They do not require any maintenance.
5. They are suitable for remote and inaccessible places where electricity power lines cannot be laid.
संबंधित प्रश्न
State two disadvantages of geothermal energy.
Write true or false of the following statement.
The energy of flowing water can be converted into electric energy (electricity).
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the ground.
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
What is the main energy transformation that occur in:
Charging of a battery.
State the energy changes which take place when:
A car moves up a hill.
State the energy changes which take place when:
Food is digested by animals.
Give one example when:
Electric energy changes to mechanical energy.
