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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
D.C. Generator A magnetic field is produced by afield coil supplied with a D.C. current and a rotor is placed between shaped pole pieces and wound with an armature wind
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Q. Determine the Fourier series for the periodic wave - forms given in Figure.
FIGURE shows a pneumatic circuit diagram used for air supply and exhaust in an automatic control system. (a) Name all symbols (including pipelines) used in the system. (b) N
By a simple time multiplexing of natural samples over a single line, a large radar site transmits 85 analog signals, each with 200-Hz bandwidth. If the sampling is done at twice th
Hi, i''ve been given this task: You are required to design a multi-stage audio amplifier with the following specification: Voltage gain 250 Input resistance 200 kOhm Output resi
for the following circuit find i(t)
What is the impedance Z between terminals A and B of the networks shown below? Express your answers in polar form. Three voltages represented by v 1 (t)=100cosωt, v 2 (t)=7
how over compensation by capacitive var rises voltage in a circuit?
Q. Mode of propagation of electromagnetic waves? The mode of propagation of electromagnetic waves in free space and atmosphere may be subdivided into three categories: • Gro
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