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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
explain a basic measurement system
Design a combination circuit to combine two signals as follows: v 0 = -2 v 1 - 8v 2 - v 3 The following specifications are imposed: R in ≥ 20 k? at all inputs All
1. Modeling of Armature and Field Controlled DC motors: Steady state and dynamic models; development of block diagrams; assumptions used; complexity involved in realistic models;
Q. Define amplification factor, drain resistance and transconductance and derive the relationship between drain resistance and trans conductance? Drain resistance It is the
Characteristics of Common Source Amplifier At low frequencies and by using a simplified hybrid-pi model, the following small-signal characteristics can be derived.
Q. Determine voltage and current gains for the CE BJT amplifier shown in Figure with the following parameters: R 1 = 30,000, R 2 = 9000 ,R C = 750 ,R E = 250 , R L = 1000
Managing Change: 1 The prominent actors included in the change procedure in an organisation are Change Makers, Change Agents, Change Leaders and they play a strategic role in
Comparison with vacuum tubes: Prior to the growth of transistors, vacuum (electron) tubes (or in the UK (United Kingdom) "thermionic valves" or just "valves") were the major a
LAN topologies: Network topology is a physical schematic that demonstrates interconnection of the many users. There are four fundamental topologies as under: (i) Direct Connect
how capacitor works as transducer?
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