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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. Advantages of subscriber loops signalling? (i) Information can be exchange between processors much more faster than when channel associated signalling is used. (ii) As a
Q. Consider an RC parallel circuit excited by (a) i(t) = 20e -2t A, and (b) i(t) = 20 A. Find the forced component of the current through the capacitor for R = 2 and C = 2F.
input impedence
Q. Sketch the depletion MOSFET drain characteristics The depletion-type MOSFET has a structure similar to that of the enhancement-type MOSFET with one important difference: The
Draw and explain the block diagram of DMA controller. The fundamental idea of DMA is to transfer blocks of data directly between peripherals and memory. The data don't suffer t
Unconditional Return RET Instruction: This instruction is used to transfer the program sequence from subroutine to the calling program unconditionally. The instruction forma
equivalent circuit for transistor using h parameters
Question 1 Explain the term telecommunication and how its implied meaning has changed over time and outline major developments in telecommunication technologies Question 2
Design a combinational logic circuit to convert XS3BCD code in to the standard 8421 BCD code.
What is use of co-processor in a typical microprocessor based system. This is a processor that works in parallel with the major processor. This has its own set of specialized i
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