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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
What name is given to the heat energy obtained from hot rocks inside the earth?
A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
Select the correct alternatives
A ball rolling on the ground possesses
A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same ?
Differentiate between the potential energy (U) and the kinetic energy (K).
Name two examples in which the mechanical energy of a system remains constant.
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.
State the energy changes which take place when:
A car moves up a hill.
Give one example when:
Sound energy changes to electric energy.
