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Q. What are secondary cells? Give an example?
i) They are rechargeable.
ii) The chemical reactions which take place in secondary cells are reversible.
iii) The active materials which are used up when the cell delivers current can be reproduced by passing current through the cell in opposite direction. Instance lead acid accumulator and alkali accumulator.
Eg of like and unlike parallel forces
what are coherent waves
Enrique Iglesias belts out a high-C (1024 Hz) from the deck of his yacht. What is the wavelength of this sound wave in the surrounding air? As the sound wave enters the ocean below
E lectrons have very much smaller mass than that of ions, so they respond more rapidly to a changing electric field. For electric field that oscillates at extremely high frequencie
Two light rays will interfere constructively with maximum amplitude if the path difference between them is: a) one wavelength b) one-half wavelength c) one-qua
suppose you are running and want to stop at once. surely you will have to produce negative acceleration in your speed. can you tell from where does the necessary force come ?
a pond is an example of
Magnetism: Everyone has seen and handled a magnet in the form of a straight or horseshoe-shaped bar of steel or steel-alloy. The magnet was originally a piece of steel befor
operation symmetry
What are the types of fibre optics?
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