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Current, voltage, and power to a three phase system are measured and found to be 20 A, 550 V and 10.5kW respectively. Determine equivalent circuits per phase as follows: (a)wye connected series comb
Three identical impedances of (12+j15)ohms are connected in wye to a 550V balanced three phase source. Determine, (a)the magnitude of the line currents. (b) the total power dissipated for the three
Calculate the maximum power that can be sent through an a=2cm , b=1cm air-filled waveguide at 12GHz such that dielectric breakdown does not occur. Assume that the dielectric strength of air at atmos
An unbalanced Wheatstone bridge circuit has resistance arms of 400, 40, 602, and 6000-ohm taken counterclockwise around the bridge. The galvanometer has a resistance of Rg=110-ohm and is connected b
what is the probability of rolling at least one 6 in rolling six fair dice at one time. what is the probability of rolling at least two 6s in rolling 12 fair dice at one time.
A 200-kVA, 2300\230-V, 60-Hz transformer operating at rated voltage in the step-down mode is supplying 150 kVA at 0.654 power-factor lagging. Assume the transformer is ideal. Determine (a) secondary
Suppose your circuit laboratory has the following standard commercially available resistors in large quantities: Using series and parallel combinations and a minimum number of available resistors, h
Sketch the appropriate equivalent circuit and phaser diagram and, assuming step-down operation, determine (a) the magnetizing current and the core-loss component of exciting current; (b) the excitin
A core-type transformer rated at 37.5 kVA, 2400/480 V, and 60 Hz has a core whose mean length is 1.07 m and whose cross-sectional area is 95 cm^2. The application of rated voltage causes a magnetic
What is the capacitance ratio for the capacitors with Ta2O5 and oxide/nitride/oxide dielectrics for the same thickness, provided the oxide/nitride/oxide has thickness ratio 1:1:1 for the oxide to th
A circular capacitor of radius r is made using SiO2 as the dielectric on a silicon wafer. If a trench of depth l is made to replace the circular capacitor with the trench capacitor with trench depth
Two charges, q and 5q, are separated by a distance d in air. Assume that the charge q is at the origin and the charge 5q is at x = d. A third charge is placed on the x axis so that the entire system
if the user enters an invalid response (i.e.- anything other than ‘y', ‘Y', ‘n', or ‘N') the program should print an appropriate admonishment and repeat the question. Do not
one of a handful of planned air car models can hit 68 mph and has a range of 125 miles. it will take only few minutes to refuel at gas station equipped with costume air compressor unit. it should co
find the force between a charged circular loop of radius b and uniform charge density l and a point charge Q located on the loop axis at a distance h from the plane of the loop. what is the force wh
Assume the temperature is 300K and mobilities are u_n = 1300 cm^2/Vs and u_p = 450 cm^2/Vs. a. What are the majority and minority carrier concentrations b. What is the resistivity of the sample c. Wha
(a)find the work done in moving a point charge +2C from (2,0,0) to (0,2,0) and then from (0,0,0) to (0,2,0). (b)find the work done in moving a point charge +2C from (2,0,0) to (0,2,0) along the straig
The doping level of N-type semiconductor is Nd= 5^19 cm^-3. Determine the room tempature position of the Fermi level ( with respect to the bottom of the comduction band) if the semiconductor is A).
Assuming that the effective mass of electrons in the conduction band of GaAs is temperature independent and equal to m* = 0.067mo* , determine the effective density of states Nc at T1= 77k, Tr =300k
what single amount at the end of seven years is equivalent to a uniform annual series of %5000 per year for 12 years if the interest rate is 8% compounded annually
you borrowed $10000 from a local bank with the agreement that you will pay back the loan in five years the pay back plan includes two parts: a graduated payment plan with the first payment set at 15
The light from a camera's electronic flash is produced when a high voltage, obtained by charging a capacitor, is applied to electrodes in a xenon-filled flash bulb. To what voltage would a 791. micr
Using the expression relating the rate at which current changes in an inductor to the voltage produced at it, find the voltage across the inductor when a switch supplying 7.9 A to a 2.4 mH inductor
A distortionless transmission line operating at 125 MHz has characteristic impedance = 40-ohm, attenuation constant = 0.02 Np/m and phase constant = 0.75 rad/m. Find the resistance and inductance pe