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A moving coil galvanometer consists of a coil in a uniform magnetic field Bo, suspended fro a fibre of torque constant C, current I produces a deflection O=nABoi/c where n is the number of turns and A is the area of the coil. The period of oscillation T=2?(I/C)1/2 where I is the moment of inertia. The resistance of the coil and the circuit in which it is placed is adjusted to give a critical dumping Rc=n2 A2Bo2/2(ic)1/2 . if the minimum detectable current produces deflection equal to thermal -root mean square value O, show that minimum current is given by
imin =( ?KT/ TRc)1/2
Illustrate the working of full wave rectifier using bridge rectifier. How is it different from centre tapped Rectifier ? Illustrate Avalanche and Zener breakdown. Draw & explain
Q. What do you mean by Instrument transformers? These are generally of two types, potential transformers (PTs) and current transformers (CTs). They are designed in such a way t
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Asset information management system: GIS has the potential to revolutionize the reform procedure in areas such as consumer indexing, asset and work management, distribution ne
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Q. How is the electron beam focused to a fine spot on the face of the CRT? Sol. The functional diagram of an electrostatic focusing arrangement is shown below. The pre-accele
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a) Describe Schmitt trigger with the help of transfer characteristics. b) Also get the expression of hysteresis voltage VH and output waveform for sinusoidal input signal
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