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A 415V 50 Hz three phase supply has been divided into three balanced loads, as follows:
LOAD 1 (STAR): 15 kVA at a power factor of 0.60 lagging;LOAD 2 (DELTA): 24 kW at a power factor of 0.55 lagging;LOAD 3 (DELTA): ZRW = ZWB = ZBR = Unknown impedance, but components are known to be balanced.
The system draws a total apparent power of 44kVA at a power factor of 0.82 lagging from the supply.
Determine:
(i) the STAR capacitance required to correct the overall supply Power Factor to 0.87 lagging.(ii) The total line current drawn from the supply before power factor correction and after.
TDMA has 416 frequencies in one of the cellular license bands. If a cellular operator designs a network with a 5/15 reuse pattern, how many frequencies per cell (sector) can be supported? ( ignore control channels)
A very long cylinder of radius 2.00 cm carries a uniform charge density of 1.50 nC/m. Taking the reference level for the zero of potential to be the surface of the cylinder, find the radius of equipotential surfaces having potentials of 10.0V, 20...
When the body metabolizes glucose water and carbon dioxide are produced according to the following equation. C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O If 0 g of glucose are metabolized with excess oxygen
We have v1(t)=10cos(wt+30degrees). The current i1(t) has an rms value of 5A and leads v1(t) by 20s. (The current and the voltage have the same frequency) Draw a phasor diagram showing the phasors.
A meter movement has a series resistance of 10-ohm and a full scale current of 100mA. Use this meter movement to design a 10A full scale ammeter. Be sure to show a schematic of your design.
A telephone line has the following parameters: R = 40 W/m, G = 400 mS/m, L = 0.2 mH/m, C = 0.5 nF/m. (a) If the line operates at 10 MHz, calculate the characteristic impedance Zo and velocity u,
Assuming that only integer multiples of a unit bipolar transistor having IS = 3 x 10-16A can be placed in parallel, and only a single voltage source, VB, is available (Fig. 4.54), construct the required circuit with minimum number of unit transist..
a. Tablulate the truth table for an 8x4 ROM that implements these Boolean functions. b. Tabulate the PLA programming table for these functions. Minimuze the number of product terms. c. Implement this circuit using a PAL with 3 inputs, 4 outputs and 3..
Recall that for discrete sequences the ts sample period (the time period between samples) is the reciprocal of the sample frequency fs. Write the equations, describing time-domain sequences for unity-amplitude cosine waves
The detector will take in numbers from 1510 to 010 encoded in binary labeled [N3:N0] with N3 being the most significant bit. The output will be asserted when the decimal value of the input is a prime number (i.e., 2,3,5,7,11,13). The output is de-..
The signal transmitted by a Base Station has a power of 1 mW at a distance of 1 m from the transmitter. Measurements have shown that the propagation exponent for the path loss is n=3 up to a distance of 1 km and n=4 beyond that.
Develop the pseudo-code below for a program that will retrieve 2 bytes (NUM1 and NUM2) from memory, determine which is closest to the numeric value 50, and indicate the result by setting a variable named "CLOSEST" to 1 (if 1st byte is closest) or ..
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