Advertisements
Advertisements
Question
State the energy changes in the following case while in use:
an electric bulb
Advertisements
Solution
Electrical energy into light energy
RELATED QUESTIONS
State two disadvantages of geothermal energy.
Fill in the blank
An object falling freely from the roof of a multistorey building has ________ and _________ energy when halfway down the building.
Give one disadvantage of using a solar cell.
State two advantages of producing electricity from solar energy.
Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.
Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.
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
|
Can you tell?
What are the various forms of energy?
