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Suppose a resistor whose value is equal to the motor resistance is connected across the motor terminals and the motor is spun at 200 RPMs. What will be the voltage measured across the motor terminals?
A 50 ohm source is connected to a 50 ohm receiver using 30 ft of RG58U coaxial cable. If the source output is 100 MHz and -30dBm, determine the voltage at the receiver in mV and dBuV [6.05 mV , 75.6 dBuV
A body attached to earth ground by an electrical conductor is at zero electrical potential. A charge of 25 C is added to the body. What is the potential of the body now. Explain.
Assume the average energy density of sunlight to be 800 w/m^2 ---and the overall photovolatic system efficiency to be 10 percent. Calculate the land area covered with photovolatic cells needed to produce 1000 Mw , the size of a typical large centr..
A group of technicians is gathered around a circuit that works with one signal generator but nit with the other. No one can figure out why one generator works but not the other. What might be happening.
In a digital audio system, a digital to analog converter reproduces the analog voltage levels represented by the digital samples. This signal is inherently jagged with sharp transitions between each sample.
Design a full-wave bridge rectifier to deliver 12DC with less than 0.1V ripples into a load drawing 100mA. Specify any components as well as the input AC voltage required. Assume 0.6V diode drops.
Write an instruction sequence to subtract the 4-byte number stored in memory locations 0x10-0x13 from the 4-byte number stored in memory locations 0x00-0x03 and store the difference in memory locations 0x20-0x2
Sketch a Bode plot for the frequency response of a High-pass R-C filter where R=470ohms and C=0.047uF. Draw the circuit, calculate the actual cutoff frequency, and calculate the dB level at one-half the critical frequency and twice the critical fr..
1.The Thyristor is a natural commutation device. What does that mean. 2.Mention two reasons why the HVDC might be your choice as a power system designer to transfer large amount of power.
On Earth, we assume normal room temperature is 293 degrees Kelvin. From this, we find that the power spectral density of thermal noise is -174 dBm/Hz. On Venus, the average surface temperature is 462 degrees Celcius.
A 150 MVA, 24 kV, 125% three-phase synchronous generator supplies a large network. The network voltage is 27 kV. The generator operates with an induced voltage, which is twice the rated line-to-neutral voltage.
With a 500hp shunt wound DC motor, at 1800rpm, 500Vdc, FLA is 800Adc, Ra is 0.025 and Rf is 400. What would Va need to be if you wanted the motor to operate at 1000rpm at rated torque. Keeping the field current constant.
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