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प्रश्न
Name the device or machine which convert :
Electrical energy into light energy.
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उत्तर
An electric bulb converts electrical energy into light energy.
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संबंधित प्रश्न
What kind of energy is possessed by the following?
A running car ____________
What kind of energy is possessed by the following?
A compressed spring ____________.
What is the difference between potential energy and kinetic energy?
Name the device or machine which convert :
Chemical energy into heat energy.
Fill in the blanks with suitable words :
The principle of ___________ of energy says energy can be transformed from one form to another, but it cannot be ___________ or ___________.
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
What do you understand by the term 'transformation of energy"? Explain with an example.
Name the energy transfers which occur when :
someone speaks into a microphone
A body of mass 10 kg falls from a height of 20 m to 8 m. Calculate:
- the loss in potential energy of the body, and
- the total energy possessed by the body at any instant? (Take g = 10 m s-2)
