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1. In a distributed winding why is the phase emf less than the algebraic sum of phase current in series?
2. Derive the expression for the breadth factor by means of a phasor diagram.
3. Repeat Question 6 for the pitch factor.
4. What is the purpose of using short-pitched coils in ac windings?
5. Write the expression for phasor emf in a synchronous machine. Use standard symbols and explain what each symbol stands for.
A Series RLC with R = 50Ω and C = 32nF is connected to anideal 5 V voltage source, and is observed to be resonant at ω= 50x103 s-1. a. Draw and label the circuit diagram. Show all voltage andcurrent references.
two resistors with nominal values of 4.7K ohm and 10K ohm, are used in a voltage divider with a +15V supply to create a nominal +10V output. Assuming the resistor values to be exact, what is the actual output voltage produced
The unit impulse response of an LTIC systems is h(t)=2e^-4t u(t). Find and sketch this system's (zero-state) response y(t) if the input f(t) is e^-6t u(t).
Find the unit impulse response of the LTI system specified by the given difference equation.- Solve the difference equation given:
The synchronous speed of a 60Hz, three-phase induction motor is 1200rpm. What is the synchronous speed of the motor if it is used in a 50Hz system?
The complex permittivity for bottom round steak is about epsilon = 40(1 - j0.3)*epsilon0(e0) at the operating frequency (2.5 GHz) of a microwave oven. What is the penetration depth
GaAs LED emitting surface size is 180 um by 180 um. The doping levels are NA = 9 E+15 cm-3 and ND = 5 E+17 cm-3. The n-layer is 70 um thick, and the p-layer is 8 um thick.
A solar panel consists of four parallel columns of PV cells. Each column has 10PV cells in series. Each cell produces 2W at 0.5V. Compute the voltage and current of the panel.
A student from electromechanical systems class planned to construct a transformer that will cause an actual load resistance of 48.2-ohm to appear as 116.3-ohm to an AC voltage source of 211.3 V rms.
A PM stepper motor has six poles and a bipolar supply (i.e., the current into each coil pair can be either positive or negative). Figure 18.9 depicts a four-pole stepper motor as an example; the motor described in this problem has two additional p..
Write a computer program to evaluate degradation due to flat Rayleigh fading at a specified error probability. Include PSK, FSK, DPSK, and noncoherent FSK.
Many communication systems connecting computers employ a technique known as "packet transmission." In this type of system, a collection of binary digits (perhaps 1000 of them) are grouped together and transmitted as a "packet."
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