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प्रश्न
State the law of conservation of energy.
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उत्तर
According to the law of conservation of energy, energy can neither be created nor can it be destroyed. It only changes from one form to another.
संबंधित प्रश्न
Work done = Force × ........................................
In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
Express joule in terms of erg.
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
Can work done be zero even if force acts on the body?
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
Give an example
Chemical energy changes to electrical energy.
Who is the odd one out?
