Advertisements
Advertisements
प्रश्न
Give two examples each of renewable and non-renewable sources of energy?
Advertisements
उत्तर
Renewable sources of energy: Solar energy and wind energy.
Non-renewable sources of energy: coal and oil.
संबंधित प्रश्न
State the energy change in the following device while in use:
A glowing electric bulb.
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
Why using wood as fuel is not advisable although wood is a renewable source of energy?
Explain the principle of generating electricity from hydro energy.
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
State the energy changes which take place when:
In a heat engine.
Give one example when:
Mechanical energy to heat energy.
Give one example when:
Chemical energy to electrical energy.
Match the pairs.
| Group 'A' | Group 'B' | ||
| (1) | Rolling object | (a) | Heat energy |
| (2) | Food | (b) | Atomic energy |
| (3) | Stretched bow | (c) | Kinetic energy |
| (4) | Sunlight | (d) | Potential energy |
| (5) | Uranium |
(e)
|
Chemical energy
|
