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Determine which waveform in each pair is lagging:
a) 6 cos(100πt-1000) and -6 sin (2π60t+1300)b) cos(10t-1000) and - cos(t-1000)c) cos (50πt - 1000) + cos (50πt - 200) and 9 cos (100πt - 200)
A uniformly doped abrupt p-n junction (step junction) diode is fabricated. At room temperature 25% of the total space charge region (depletion region) is in the p region. The built in potential is also measured to be 0.710V.
Two small plastic spheres are given positive electrical charges. When they are a distance of 15.6{\rm cm} apart, the repulsive force between them has a magnitude of 0.235{\rm N} .What is the charge on each sphere if the two charges are equal
Further suppose that the coins C1, C2, and C3 are biased such that the probabilities of a head occuring for coins C1, C2, and C3 are 0.9, 0.75, 0.60, respectivley, while the fourth coin C4 is a fair coin. A. If the ou..
Determine the panel orientation you would choose to obtain maximum energy: (a) Over the year (b) In the summer (c) In the winter Discuss your choice of slope angles if the location is at 75°N.
A 12V-DC power supply that gets it's power from the 110V (RMS) wall outlet needs a transformer as a first step in generating its output. The rectification and regulation stage of the power supply needs an input voltage of 15V (peak)
A silicon p-n-p transistor has impurity concentrations of 5*10^18, 2*10^17, and 10^16 cm^-3, diffusion constants of minority carriers 52, 40, and 115 cm^2/s and minority lifetimes of 10^-8, 10^-7, and 10^-6 in the emitter
1. The net charge through a cross section of a circuit element is given by q(t)=2t+t^2 C. As usual, t is in seconds. Find the current through the element in amperes. 2. the current through a given circuit element is given by i(t)=2e^-t A. As usual..
b)If the calculator produces three digit random numbers that are uniformly distributed between 0.000 and 0.999, find the variance of the sample mean. c) How large should the sample size be in order to obtain a sample mean whose standard deviation i..
A Si p-n-p transistor has impurity concentrations of 5´1018, 2´1017, and 1016 cm-3 in the emitter, base, and collector, respectively. The base width is 1.0mm, and the device cross-sectional area is 0.2 mm2.
The HCS112 SPI is configured for 6 Mbaud. Assuming that it takes 1 microsecond to load each character, how much time is required to transmit 10 characters
A 240kW 500 Volt 1750rpm separately excited dc generator has an overall efficiency of 94%. The shunt field resistance is 60ohms, and the rated current is 5amps. The I^2R loss in the armature is 0.023pu.
A P=900W electric motor with pf=0.82 lagging is connected to a 240 Vrms 60 hertz source. a) Draw an equivalent circuit showing impedance and phasor values for Vs, R and X. b) Find an Xc value to put in parallel with the motor which corrects the pf to..
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