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प्रश्न
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
पर्याय
Electrical to mechanical
Electrical to chemical
Chemical to mechanical
Chemical to electrical
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उत्तर
Chemical to electrical
Hint: When current is drawn from an electric cell, the chemical energy stored in it changes into electrical energy.
संबंधित प्रश्न
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.
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.
Is work done a scalar or a vector physical quantity?
Give an example
Chemical energy changes to electrical energy.
A force is applied on a body of mass 20 kg moving with a velocity of 40 ms−1. The body attains a velocity of 50 ms−1 in 2 seconds. Calculate the work done by the body.
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.
