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A speaker can be modeled as an inductor LS (the coil that generates the magnetic field to move the speaker diaphragm) in series with a resistor RS (resistance associated with the coil wire, as well as the energy lost to the acoustic output the speaker produces). It is possible to measure LS and RS with the following circuit. Connect the speaker in series with a known resistor Rext and apply a sinusoidal signal vin of frequency f. Measure the amplitudes of vin and the voltage vext across Rext as you increase f. Derive the amplitude ratio |vi| / |vext| as a function of f.
Three single-phase two-winding transformers, each rated 25 MVA, 34.5/13.8 kV, are connected to form a three-phase bank. Balance positive-sequence voltages are applied the high voltage terminals, and a balanced, resistive Y load connected
Explain the function of the HMI in a SCADA system.
A parallel circuit contains an AC voltage source of 3 Vrms, 100 Hz. The output of the voltage source is connected to a diode (1N4004). After the diode, connected in parallel are a 0.1uF capacitor and a 100 kohm resistor.
What is the memory layout of the 16-bit value, 0x7654 in a big-endian 16-bit machine.
Compute the Transfer Equation, The questions are for the equation: y"(t) + 6y'(t) + 34y(t) = 2x'(t) + 11x(t)
If the EM wave of 10 kW transmitted is hitting a truly reflecting building at 20o and 5m from normal, the coefficient of reflection is r=0.5, at which location the reflected ray is max and its power density at 5m in that direction
Consider that you have an op amp integrated circuit package such as the LM741 in Appendix C. what type of testing appropriate for testing this device. write a short test plan for doing.
Design a summing amplifier that produces an output Vout = (5/2)V1+(5/3)V2 - 4V3 . Draw the complete schematic and pick the appropriate component values. The smallest resistor in the circuit should be R
Air Enters a cooling section at 97Kpa, 35C and 30 percent relative humidity at a rate of 6m^3/min, where it is cooled until the moisture in the air starts condensing. Determine the temperature of the air at the exit and the rate of heat transfer i..
A combined-cycle, natural-gas, power plant has an efficiency of 52%. Natural gas has an energy density of 55,340 kJ/kg and about 77% of the fuel is carbon. a. What is the heat rate of this plant expressed as kJ/kWh and Btu/kWh
Each start/stop station contains one NO start pushbutton and one NC stop pushbutton.
Sketch a set of iD-vDS characteristic curves for an NMOS Transistor operating with a small vDS. Let the MOSFET have k = 5ma/V^2 and Vt = 0.5V. Sketch and clearly label the graphs for VGS = 0.5,1.0,1.5,2.0, and 2.5V.
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