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A 100kVA, 60Hz, 7200-480V, single-phase transformer has the following parameters expressed in ohms: Rhs=3.06 Rls=0.014 Xhs=6.05 Xls=0.027 Xm,hs=17,809 Rfe,hs=71,400.The transformer is supplying a load that draws rated current at 480V and 75 percent power-factor lagging. Sketch the appropriate equivalent circuit and determine (a) the equivalent resistance and equivalent reactance referred to the high side; (b) the input impedance of the combined transformer and load; (c) the load component of the high current side; (d) the input voltage to the transformer; (e) the exciting current and its components; (f) the input impedance at no load.
Design a series resonant circuit to have a bandwidth of 400 Hz using a coil with a Ql of 20 and a resistance of 2. Find the values of L and C and the cutoff frequencies.
An address decoder in a 68000-based microprocessor system selects a memory device when the address lines A23, A22, A21, A20, A19, A18 = 1, 0, 0, 1, 1, 0. What is the size of the memory block decoded and what range of addresses does it span
A constant (dc) current i(t) = 3 mA flows into a 51-F capacitor. The voltage at t = 0 is v(0) = -21V . The references for v(t) and i(t) have the passive configuration. A) Find the power at t=0. B) State whetehr the power flow in into or out of the ..
a) What is the velocity of the particle b) If this velocity is known to within 0.2% accuracy, what is fx of the position that particle? Assume that the mass of the particle is 2 x 10-26 kg.
a defibrillator supplies a maximum energy dosage of 20 jouls, and the maximum voltage of 8 volt. suppose it is desired to charge the capacitor from an ideal DC current source, and they want to do it in less than 80 seconds.
A control system for positioning the head of a floppy disk drive has the closed-loop transfer function T(s)=11.1(s+18) / (s+20)(s^2+4s+10). Plot the poles and zeros of this system and discuss the dominance of the complex poles.
1.) What is used by the 32Bit STOS instruction to locate the destination location in memory 2.) What 32bit register is changed by EVERY instruction 3.) What is the register is the lowest byte of the D general purpose register
Find values of the intrinsic carrier concentration ni for silicon at -70, 0, 20, 100, and 125 °C. At each temperature, what fraction of the atoms is ionized. Recall that a silicon crystal has approximately 5×1022 atoms/cm3.
If a third attempt is made within 20 seconds, a waiting period of 20 seconds is required before additional attempts can be made to start the motor. While waiitng to make additional attempts to start the motor.
Given an input signal x[n] whose sample values are given in the table below. Find and plot the first 4 samples of the output that results when this input is applied to the two filters below: (Use n=0, 1, 2,3) A: Filter 1 Equation: y[n] = x[n] - 0.5..
To familiarize yourself with the Internet Standards, search the Internet for the IETF RFC website. Using the information you find on this site, answer the following questions: Identify four types of Internet standards.
Explain the following terms; (i) critical radius of insulation. (ii) economic lagging thickness.
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