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प्रश्न
Write true or false of the following statement.
In an electric fan, electrical energy changes into the mechanical energy.
पर्याय
True
False
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उत्तर
True.
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संबंधित प्रश्न
Write true or false of the following statement.
Potential energy changes into kinetic energy when it is put to use
Match the following columns
| COLUMN A | COLUMN B |
| 1. Running water | 1. heat energy |
| 2. Burning | 2. vibrations |
| 3.Energy | 3.atom bomb |
| 4.Sound energy | 4.kinetic energy |
| 5.Nuclear energy | 5.joule |
Select the correct alternatives
When we rub our hands
Select the correct alternatives
When a bulb lights up on passing current, the change of energy is
State two factors on which the potential energy of a body at a certain height above the ground depends.
Answer the following in short.
What do you understand by the term efficiency of a machine’?
Name two units of power bigger than watt.
How many joules are there in one kilowatt-hour?
A cell converts one form of energy into another form. Name the two forms.
Which one of the following is not the unit of energy?
