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The cross section of a sheet steel core is 0.1 m X 0.1 m and its stacking factor is 0.93. If H = 1500 At/m, compute flux density B and magnetic flux .
Problem 1. Explain the purpose of the capacitor in the microphone circuit.
In a 60-HZ, 208 V (line-line, rms), 5-kW motor, R'r = 0.45Ω and X'tr = 0.83Ω. The rated torque is developed at the slip s = 0.04. Assuming that the motor is supplied with rated voltages and is delivering the rated torque,
A bus in a balanced three-phase power system has a three-phase capacitor bank that supplies 1200 kVAR. In parallel with the capacitor bank is a three-phase load that draws 3500 kW at a power factor of 0.707 lagging.
a) Determine the numerical value of To. b) What is the average value of f(t) over the interval 0≤t≤To c) Determine the amplitude of the fifth-harmonic component. d) Determine the phase of the fifth-harmonic component.
Explain the concept of Envelope detection for Large Carrier AM. Why is Large Carrier preferred over Suppressed Carrier method for Double Sideband AM in broadcast environment.
1- Find F(s) for = A[ a cos(ßt) + b sin(ßt)] u(t) and plot and the poles and zeros in the S- plane. 2- find f(s) for = 2d(t) +4e^-2t cos(2t) u(t) and plot and the poles and zeros in the S- plane. 3- find f(s) for = 10[3-6t-4e^-2t] u(t) and plot and t..
Give an example of an RC circuit whose transient behavior cannot be modeled by having a function generator with square wave output replacing the mechanical switch.
Scientists have proposed using the radiation pressure of sunlight for travel to other planets in the Solar System. If the intensity of the electromagnetic radiation produced by the Sun is about 1.4 kW/m2 near the Earth
an 8kg block is released from the rest on a frictionless incline of angle 60.if the speed of the box is 10m/s when it reaches to the ground what was the height of the initial point it was released
An unknown semiconductor has Eg = 1.1 eV and Nc = Nv. It is doped with 10^15 cm^-3 donors where the donor level is 0.2 eV below Ec. Given that Ef is 0.25 eV below Ec, calculate ni and the concentration of electrons and holes in the semiconductor ..
A series circuit has a DC voltage source (56 volts), a resistor, (72 ohms), a capacitor (82 farads), and a switch. The capacitor is initially uncharged and the switch closes at t=0.
a) Find the value of the voltage source "E"that is required to provide a 10V across the 10kΩ resistor. What are the values of [V10k/E] and [V3.3k/V10k] b) Dtermine the amount of power supplied by the voltage source when E= 20V.
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