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Assume that a given transformer is 100% efficient; that is, the power being supplied by the primary side is transported without loss to the secondary side. (Transformers are not 100% efficient. One can detect this by the heat that they radiate.) The primary side has 100 turns. If the current and voltage on the primary side are 1 amp and 10 volts, respectively, how much current is flowing on the secondary side?
A 1.2 MW wind turbine has a rotor diameter of 64 m. the turbine operates in an area with an average wind velocity of 7.5 m/s and the air density of 1.18 kg/m^3. the turbine power coefficient including the unit efficiency is 42.8 percent.
A simple voltmeter with a full-scale reading of 50(V) is required. Use a d'Arsonval movement with a rating of 20(mV) at 1 (mA). Calculate the value of the voltmeter resistor, Rv, required to achieve these design specifications.
The fuel tank contains 33 kWh per gallon. If the vehicle were to be replaced by an electric vehicle that charges from the power grid, how much power would it draw (in W, kW, or MW) to recharge at the same rate as the gasoline powered automobile
A 230V shunt motor having an armature resistance of 0.05 W and a field resistance of 75 W draws a line current of 7 A while running light at 1120 rev/min. The line current at a given load is 46 A.
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.
Consider a system equation s^4 + s^3 + s^2 + 2s + 10 = 0. FInd out its Routh Table. Determine if this system is stable, marginal stable or unstable. How many roots are stable and how many roots are unstable.
It is required to use a peak rectifier to design a dc power supply that provides an average dc output voltage of 15 V on which a maximum of 1-V ripple is allowed. The rectifier feeds a load of 150 ohm.
Determine the cost of the energy delivered by this battery per kilowatt hour. Compare to the $0.12 per kilowatt hour for energy purchased from electric utilities in the United States.
i. The sender sends frames with increasing sequence numbers to the receiver. Only frames received in correct order are accepted by the receiver. ii. The receiver sends a NAK back to the sender when it receives an out-of-sequence frame.
How does the speed of an induction generator relate to synchronous speed Explain. How is power factor could be controlled if is is a squirrel cage machine? How about a wound rotor machine
how big will be capacitance connected on series with resistor R=30 omega in AC circuit with input voltage U1 = (200+2*17) V and frequency 50 Hz if the power factor is 0.7
Use K-map reverse engineering to evaluate if the following SOP functions are minimized If not, find the minimal SOP expression. (a) F(A,B,C,D) = A'C'D' + A'C + AB'C' + ACD' (b) F(W,X,Y,Z) = XY' + WX'Y' + W'XYZ + W'X'YZ'
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