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A factory load of 900 kW at 0.6 power factor lagging is to be increased by the addition of a synchronous motor that takes 450 kW. At what power factor must this motor operate, and what must be its KVA input if the overall power factor is to be 0.9 lagging?
Method of moments solution to scattering from a rough surface for a TM wave begins with the integral solution to the wave equation.
Consider the problem of using a low-voltage system to power a small cabin. Suppose a 12-V system powers a pair of 100-W lightbulbs (wired in parallel). a. What would be the (filament) resistance of a bulb designed to use 100 W when it receives 12 V
A power amplifier can be represented by a current source in parallel with a 200ohm resistance. An 8-ohm loudspeaker is connected to the power amplifier via an audio transformer so that maximum power is transferred to the loudspeaker. What must be ..
Writing the mathematical equations of a DC motor develop the complete model to derive the open loop transfer function between the operating speed and applied voltage.
An infinitely long line charge (Pl= 21 PI nC/m) lies along the Z-axis. An infinte area sheet charge PS= 3nC/m^2 lies in the X-Z plane at a distance Y =10 m. a) Using Gauss' law find the field E due to the line charge.
A shunt regulator utilizing a zener diode with an incremental resistance of 5ohm is fed through an 82ohm resistor. If the raw supply changes by 1.0V, what is the corresponding change in the regulated output voltage
If the circuit is driving a 100Ω load with a signal generator that has an output impedance of 50Ω and an open-circuit output voltage of .5sin(500t+30º), determine the steady state output voltage.
A long hallway has three doors, one at each end and one in the middle. A switch is located at each door to operate the incandescent lights along the hallway. Label the switches A, B, and C.
Let y(t) he the signal at the output of the LTI system when x(t) is the input signal. The following signals are sampled using a train of impulses with periodicity T, signal x(t) is sampled to obtain xc(t), and signal y(t) is sampled to obtain yc(t..
Let the SNR be a parameter and express the SNR in decibels. As in Figure 7.8, assume a QDSB system. Repeat this exercise for a DSB system.
An erbium-doped fiber amplifier has a noise figure of 4 and a gain of 10 dB. The optical input has a 30-dB signal-to-noise ratio and a signal power of 10 µW. Compute the output signal power in mW and signal-to-noise ratio (in dB) at the amplifier'..
A calibrated RTD with alpha = 0. 0041 / degree C, R = 306. 5 ohm at 20 degree C, and PD = 30 mW / degree C will be used to measure a critical reaction temperature. Temperature must be measured between 50 degree and 100 degree C.
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