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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.
The mass of a string is 4.20 x 10 -3 kg, and it is stretched so the tension in it is 135 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength o
Using a bicycle Turn a bicycle upside down so that it rests on the seat and handlebars. Turn the pedal wheel precisely one turn and note the number of turns made by the rear wh
iif radius shrinks by 20% then what will be the effect on gravitational acceleration
the joule is the same as
A 0.150-kg ball that is thrown at a velocity of 30.0 m/s hits a wall and bounces back in the opposite direction with a speed of 25.0 m/s. How much work was done by the ball?
electric field
Calculate the overall heat-loss coefficient for a solar collector with a single glass cover having the following specifications (neglect edge effects): Spacing between the plate
Assume that two linked pistons are both cylindrical in shape. Show that the ratio of forces generated is directly proportional to the square of the radii of the two cross-sect
When Temperature increases,intensity increases,but in some time intensity decreases,Why?
Q. What do you mean by lateral shift? and What could be the angle of incidence to have maximum lateral shift? Q. For what angle, lateral shift is minimum?
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