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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
A communication system for a voice-band (3 kHz) channel is designed for a received SNR E b /N 0 at the detector of 30 dB when the transmitter power is Ps =-3 dBW. Find the value o
The input to the satellite system of Figure 1 is a step function θ c (t) = 5u(t) in degrees. As a result, the satellite angle θ(t) varies sinusoidally at a frequency of 10 cycles p
Image gradient Write an m-file "grad.m" which computes and displays gradient and orientation of an input image (use Gaussian derivatives). To compute Gaussian derivative in o
i dont understand why equalizer connection is not used in wave windings?
Q. A 10-hp, 230-V dc shunt motor takes a full- load line current of 40 A. The armature and field resistances are 0.25 and 230 , respectively. The total brush-contact drop is 2 V,
A power company is developing an upgrade to an existing power plant and needs to make a requirements decision with respect to the maximum power output capacity for the upgrade. Thi
Q. Discuss the essentials of an oscillator? The essential components of an oscillator are (i) Tank Circuit: It consists of inductance coil(L) connected in parallel with ca
Explain the Power Chart The phasor diagram shown in Figure with the x and y axes added, as shown. This diagram may be converted to a 'power chart' by multiplying each phasor in
Q. explain the architecture of SS7 and compare with seven-layer OSI architecture. Ans: A block schematic diagram of CCITT no. 7 signalling system is displayed in figure. Sig
Q. Common control switching system? Common Control Switching System: A functional block diagram of a common control switching system is displayed in Figure. Control functions
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