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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. Draw a 100 line exchange using two motion selectors and elucidate, how switching takes place in it. Ans: In a 100 line exchange, every subscriber is assigned a 2 digit
State the Advantages of expert systems - Never "forgets" to ask a question in determining the logic - provides consistent answers - Less skilled work force needed, ther
Q. Explain the effect of feedback on amplifier bandwidth? The bandwidth of an amplifier is defined as the range of frequencies for which the gain remains constant.The gain -ban
Metering Standards Relevant standards on metering are given in Table. Table: Relevant Metering Standards Standards Description
Calculate the N.A of a step index fibre having n 1 =1.48 and n 2 =1.46. What is the maximum entrance angle ψ max for this fibre if the outer medium is air with n 1 =1.0? Given
I need to get a summary for a radio over fiber paper that I have , the summary need to be on the following format: abstract, introduction,methodology,results, conclusion and refere
Define Serial In - Parallel Out Shift Registers? For this type of register data bits are entered serially in the same manner as discussed in the last section and the difference
1. The coil remaining stationary with respect to the flux, the flux varies in magnitude with time. Since no motion is involved, no energy conversion takes place. Equation gives the
Gis for Distribution Network Management: You are well aware of the problems facing the distribution utilities to meet the day-to-day requirements of the power consumers, like
What are CU and NEU in 8087? CU-Control unit NEU- Numeric extension unit. The numeric extension unit implements all the numeric processor instructions whereas the control un
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