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Give three reasons why a CSMA/CD MAC frame may be invalid In CSMA/CD operation, what is the function of the PAD field? Why is it necessary to have a minimum frame length? Describe differential Manchester coding and its application to baseband LAN transmission. Compare it to conventional NRZ.
3-singlephase 2 winding transformers, each rated 500 MVA, 13.8/199.2 kV, with leakage reactance Xeq = 0.10 per unit, are connected to form a three-phase bank. Winding resistances and exciting current are neglected.
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.
An electric heater draws an average power of 1100 Watts when plugged into a 110 V-rms outlet. Calculate the resistance of the heater and the rms current.
What is the inverse Laplace transform of 32/s(s^2+64). Please show all work.
Each start/stop station contains one NO start pushbutton and one NC stop pushbutton.
1. Calculate the Fourier transform of f(t)=5 sinc ([t-0.2]/2), and graph the magnitude and phase as function of f. 2. A military satellite uses 10 GHz for the downlink frequency. The distance to the satellite is approximately 36000 km.
A silicon ingot is doped with 1016 arsenic atoms/cm3. Find the carrier concentrations and the Fermi level at room temperature (300K). Hint: assume complete ionization of impurity atoms at room temperature.
a certain 11 v dry-cell battery completely discharged requires a current of 100 ma for 1.2 hr to completely recharge.
Your friends Alice and Bob have two children. You recall that one is a boy. What is the probability that the other is a girl Hint: Think carefully about the sample space.
Point charge between parallel conducting planes. Consider a charge embedded in a dielectric material as shown in Figure 5.41. The dielectric is bound by two parallel plates, each held at a constant potential V0.
It involves developing a function called "single_phase_transformer_tests" that can work on user input data to generate the transformer voltage regulation and efficiency under various loading criteria.
a single phase 440V 80kW load with a lagging Pf of .8 is supplied through a feeder of .6+j1.6 ohms and a single phase 100 kVA, 220/440 V transformer. the equiv impedance of the transformer referred to the High Voltage side is 1.15+j4.5 ohm.
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