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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
Switching Characteristics Switching characteristics of BJT are shown in figure. Due to the presence of internal capacitances BJT cannot be turned instantly. Initially
using a combination of uniselectors and two motion selectors, draw a schematic of thousand line exchange and explain its working
i need research publication help. The topic is PHASED ARRAY ANTENNA DESIGN for KU-band. I want a research paper that can be published in some conference.
DC chopper This is one stage conversion device which is used for direct conversion of fixed de voltage at a level to an adjustable dc voltage at another level.
Q. The speed of an 8-bit A/D converter is limited by the counter, which has a maximum speed of 4 × 10 7 counts per second. Estimate the maximum number of A/D conversions per secon
Define Salient-pole Rotor Construction - Synchronous Machines? Salient-pole rotor construction on the other hand, may be used for low to medium speed applications. The machines
Give the properties and application of bronze. Bronze : It is alloy of copper and tin. This alloy is very brittle and hard. Its corrosion resistance is better than brass. Bron
(a) The key elements of a protocol are the syntax, semantics and timing. Give a brief explanation of each of these key elements. (b) A file contains 4 million bytes. Compare
What is the similarities between a vacuum diode and a triode?
Power Transistor A power transistor is a three layer PNP or NPN semiconductor device having two junctions. Three terminals of power transistors are collector emitter
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