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प्रश्न
State the energy changes in the following case while in use:
an electric toaster.
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उत्तर
Electrical energy into heat energy.
संबंधित प्रश्न
Geothermal energy is produced by the:
(a) fission of radioactive materials
(b) burning of coal inside the coal mines
(c) combustion of natural gas deep inside the earth
(d) fusion of radioactive substances
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 relevant example for the following transformation of energy :
Electrical energy to light energy.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
A stretched wire
State the energy changes in the following case while in use:
a ceiling fan
Name the energy changes for the following:
bicycle brakes
Give one example when:
Mechanical energy to heat energy.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
For the same kinetic energy of a body, what should be the change in its velocity if its mass is increased nine times?
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
|
