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A 42- space panel is supplied from a 480Y/277V, 3-phase four-wire system. Three phase conductors, the neutral, and the equipment-grounding conductor are brought to the panel. The overcurrent devices in the panel, excluding the main, consists of 9 three-pole, 30 A breakers supplying branch circuits consisting of three ungrounded conductors and an equipment grounding conductor. In addition, there are two 20 A, single-pole breakers protecting branch circuits supplying 277V lighting circuits. Is this panel classified as a power panelboard or an appliance and branch circuit panel-board?
A communications channel has a bandwidth of 2,000 Hz and a signal-to noise-ratio (SNR) of 20 dB. What is the maximum possible data rate
An FM signal being transmitted is represented by eFM(t) = 50Sin((2)(95.1)(106)t+2Sin((2)(10)(103)t)). If the antenna impedance is 75 , determine: (a) total power in FM signal and (b) FM modulation index.
A 150 KVAR capacitor is connected across the line in Problem 1. (a) Sketch and label the power triangle for the capacitor. (b) Sketch and label the power triangle for the combined loads (capacitor and motor).
The resistance of the field circuit of a shunt-excited dc generator is 200. When the output power of the generator is 100kW, the terminal voltage is 500V and the generated e.m.f is 525V.
A microwave system requires a +4-dBm audio level to provide 100% modulation. Determine the voltage level required if this is a 600 ohm audio system.
Design a sequential circuit with input x and output Z. The circuit outputs 1 whenever the input "1100" arrives. For example, the following sequence Z is generated as a result of the following input x
one group of students made an error by using HCLinstead of H2SO4 to titrate an unknown solution of NaOH. Would this error change the calculated molarity of the NaOH solution.
A 3.3V, 30 A dc power supply is to be designed with a ripple of less than 2.5%. Assume that a half-wave rectifier circuit (60 Hz) with a capacitor filter is used.
An AB latch operates as follows: If A = 0 and B = 0, the latch state is Q = 0; if either A = 1 or B = 1 (but not both), the latch output does not change; and when both A = 1 and B = 1, the latch state is Q = 1.
Design a sequencer with an enabler with 3 outputs that when enabled follows a successive clock sequence of 000,000,011,011,110,110,010,011 when the last step is reached the sequence returns to the beginning.
State Carson's rule for bandwidth estimation. What does it reduce to for NBFM and WBFM and d erive an time domain expressionfor the output xd(t) of the system
Discuss how you could build a microwave power amplifier with a power rating of 1kW with microwave power transistors with an upper power limit of 100W each. Explain how the speed of an aircraft can be measured by using pulse radar techniques.
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