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Explain Constant voltage system
Constant voltage system: In this process voltage is kept constant but results in very huge charging current in the starting when the back emf of the cells is low and a small current when their back emf enhances on being charged. With this method, time of charging is almost decreased to half. It enhances the capacity by approximately 20% but decreases the efficiency by 10% or so.
As shown in the figure below, a bubble of gas with a volume of 1.20 cm3 is released under water. As it rises to the surface, the temperature of the bubble enhances from 27°C to
Which of the following are isoelectronic with one another: (1)Na + ans Ne (2)K + ans O (3)Ne ans O (4)Na + ans K + Ans: Na + ans Ne
What is elasticity explain it briefly..
Scanning is process of dividing an image on the screen into a large number of very small squares formed by sets of horizontal and vertical straight lines. Iconoscope i
Illustrate V - I graph for ohmic and non-ohmic materials. Give one example for each.
How is a wave front dissimilar from a ray ? Draw the geometrical, shape of the wave fronts when (i) light diverges from a point source, and (ii) light emerges out of a convex le
what is gravitational law
causality principle for the Klein- Gordon equation in one dimension. Deduce that the speed of propagation is at most c. Drive causality principle for weave equation in R 2 u t
First law of thermodynamics is stand on the principle of the conservation of power. According to the first law, ΔQ = W + ΔU Where, Δ Q = heat given to the system
what is the equation for work
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