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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.
Water at 20°C flows through a long, straight pipe. The pressure drop is measured along a section of the pipe of length 1.3 m as a function of average velocity through the pipe. Res
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Light with a frequency of 7.5 x 10 14 Hz is able to eject electrons from the metal surface of a photocell that has a threshold frequency of 5.2 x 10 14 Hz. What stopping potentia
if a body contain n1 electron and n2 proton what is the total charge on the body?
theory of wedge constraint
Ohm's law : The electric current (i) in a conductor is proportional to the potential difference (V) between its ends of a constant temperature (T). Verification: To v
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Explain the term 'work function' of a metal. The threshold frequency of a metal is f 0 . When the light of frequency 2f 0 is incident on the metal plate, the maximum velocity of e
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lab manual
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