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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
The problem with a battery charger (say, for portable devices) is that it continues to draw power even after the battery is fully charged thereby wasting electricity. In addition,
When both MT 2 and Gate are Negative In this case N 3 works as a remote gate. Current flows form layer P 2 to layer N 3 junction N 1 P 1 is reverse biased and it br
cosider a causal LTI system whose system function is H(z)=1-1/5z^-1/(1-1/2z^-1+1/3z^-2)(1+1/4z^-1) find the direct form 1 and direct form 2
derived expression for reluctant torque in rotating electrical machine
Safe Conduct : what if a trailing flex became caught up in an apparatus trolley and was cut? Or someone splashed water onto a plug, or concentrated sulphuric acid onto a flex? F
importance of dummy coils and equalizer connections
Q. Consider a pair of coupled coils as shown in Figure of the text, with currents, voltages, and polarity dots as indicated. Show that the mutual inductance is L 12 = L 21 = M by
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Explain how materials can be classified into three groups on the basis of atomic structure. An atom has a positively charged nucleus surrounded through a group of negatively ch
Linearize the swing equations around an equilibrium point. Compute the transfer function from the input U to the output !. For which equilibria is the linearizes system stabl
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