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3-phase-Y-connected load of 40,000W at 0.8 PF lag is supplied by a three-phase Y-connected source of 500V. Find the current and phase voltages. Assuming Van as ref. Determine Ian, Ibn, Icn, Vab, Vbc
Suppose you want to build a simple RS flip-flop that is set and reset by negativegoing pulses. All you have are two 2-input AND's and two 2-input NOR's. Show how you would build this odd circuit fro
3-phase line, which has an impedance of 2 + j4 per phase, feeds two balanced three-phase loads that are connected in parallel. One of the loads is Y-connected with an impedance of (20 + j40) per ph
Two particles are fixed to an x axis: particle 1 of charge q1 = 2.03 x 10-8 C at x = 16.0 cm and particle 2 of charge q2 = -4.62q1 at x = 77.9 cm. At what coordinate on the x axis is the electric fi
While both triangular and sawtooth waveforms work in a PWM modulator, it does affect the phase of the PWM output and being able to control this can be useful. Consider your resistor and capacitor ch
A causal discrete LTI system is described by y(n)-3/4 y(n-1)+1/8 y(n-2)=x(n) where x(n) is the input and y(n) is the output Find the response of the system if x(n) =u(n)
(a) Find Cox and (b) For an NMOS transistor with W/L = 15 m/0.25 m, calculate the values of VOV , VGS, and VDSmin needed to operate the transistor in the saturation region with a dc current ID= 0.8
A uniform electric field exists in the region between two oppositely charged plane parallel plates. An electron is released from rest at the surface of the negatively charged plate and strikes the s
What happens to the program counter (PC) when a subroutine is called. What register is used to keep track of the return point. What happens to the register that keeps track of the return point if a
A (3V, 300mA) flashlight bulb is to be used as the dial light in a 120V radio. What is the resistance of the resistor that should be connected in series with the flashlight bulb to limit the current
A parallel circuit consists of a source and 15 ohm and 30 ohm resistors. The resistor of 15ohm draws a current of 8A. a) Find the current out of the current source. b) Find the current through the 30
A string of Christmas tree lights of eight (6W, 15V) bulbs connected in series. a) What current flows when the string is plugged into a 120V outlet b) What is the resistance of each bulb
A series circuit consists of a 240V source and 20ohm, 30ohm, and 10ohm resistors. a) Find the current out of the positive terminal of the voltage source. b) Find the voltage across each resistor.
What is the equivalent (total) resistance of 100, 200, and 50 resistors connected in series What is the equivalent (total) resistance of 100, 200, and 50 resistors connected in parallel
Design a circuit that given a 4-bit BCD digit(0-9) willproduce a 2-bit quotient and a 2-bit remainder for a division by3. This circuit will have four inputs the four bits of theBCD digit and four o
a single span of an overhead line is 250 ft in length, having the supporting poles at the same level. the maximum tension in the conductor is 855 lb. the weight of conductor is 0.125 lb/ft.
What do they mean by these two statements. For example, are they asking us to keep Voltage or Current constant in either statement and vary the Resistance finding the unknown Voltage or Current or w
A windmill has a diameter of 3 meters. It converts wind enegry to electrical enegy with a efficiency of 40% of the theoretical maxium for windmills. What is the eelctric power output at a wind velci
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 b
Convert function H(A, B, C) = (AB + C)(AC + B) into both the sum-of-products and product-of-sums forms. Obtain the truth table and express the function in both canonical forms: sum-of-minterms and
A three-phase, four-pole, 50-hp, 480-V, 60-Hz, Y-connected induction motor has the following parameters per phase: r1 = 0.10 , x1 = 0.35 , r2' = 0.12 , x2' = 0.40 . It is kn
Draw energy band diagrams, for k lying between 0 and pi/a (take a=5Ã), for a material whose valence band follows the equation. and calculate the effective masses for conduction and valence band
Design an opamp circuit to perfom the following mathmatical operations on three seperate ideal voltage sorces, V1, V2, and V3. V0 = 10V1 + 4V2 - 8V3
The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its stand and cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is
Calculate the lowest 3 energy levels in a quantum well made from InAs, using the infinite potential approximation. Length of the well L = 10 nm.