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प्रश्न
Fill in the boxe to show the corresponding energy transformation.
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उत्तर
Electrical energy ⇌ Sound energy
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संबंधित प्रश्न
State the S.I. unit of work and define it.
A person of mass 50 kg climbs a tower of height 72 metres. Calculate the work done. (g = 9.8 m s−2).
Name five appliances or machines which use an electric motor.
Give two examples of couple action in our daily life.
A boy of mass m climbs up a staircase of vertical height h.
- What is the work done by the boy against the force of gravity?
- What would have been the work done if he uses a lift in climbing the same vertical height?
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A green plant is carrying out photosynthesis.
