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प्रश्न
What are the various forms of energy?
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उत्तर
Energy exists in various forms in our universe. Some of the major forms of energy are:
(i) Kinetic energy
(ii) Potential energy
(iii) Chemical energy
(iv) Heat energy
(v) Light energy
(vi) Sound energy
(vii) Electrical energy
(viii) Nuclear energy
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संबंधित प्रश्न
In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason.
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
State whether the object possess kinetic energy, potential energy, or both :
A bird running on the ground ____________.
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
Name the energy transfers which occur when : there is a picture on a television screen
Which one of the following is not the unit of energy?
Which of the following energy change involves frictional force?
