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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
Q. The self-inductances of two coupled coils are L 11 and L 22 , and the mutual inductance between them is M. Show that the effective inductance of the two coils in series is give
multiplexer,
principle of 120 degree mode of operation of voltage source intverter
Q. Briefly explain about Wheatstone Bridge? Null measurements are made with bridge circuits and related configurations. They differ from direct measurements in that the quantit
what is the necessity of copper brushes in dc motors?
Design a wide band pass filter with cut-off frequency f L = 400 kHz, f H = 600 kHz, and a pass-band gain = 10. The roll-off rate at the cut-off frequency should be at least 4
Singles Phase Half wave Controlled Rectifier with RL Load When gate pulses are applied to the thyristor at output voltage v0 follows the input voltage v s ( = V m sin ) s
Explain Memory Mapped I/O Scheme. Memory Mapped I/O Scheme: In such scheme there is only one address space. These address space is defined as all possible addresses which m
A TDM signal of the type is formed by samplingM voice signals at fs = 8 kHz. If the TDM signal then modulates the amplitude of a 4-MHz carrier for radio transmission, determine the
Q. Show Benefits of digital systems? Ever since most digital systems have only two possible states, there is high degree of accuracy in the transmission of data. With an analog
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