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A three phase star connected load is connected across a three phase balanced supply system. Obtain a set of questions relating to symmetrical components of the line and phase voltages.
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 combination of resistance and reactance in each phase.
A 500 line/mm diffraction grating is illuminated by light of wavelength 510 nm. How many bright fringes are seen on a 2.0 m wide screen located 2.0 m behind the grating
If you were the operator for an squirrel cage induction machine, what options could you consider to control speed Describe and mention pluses and minuses of each.
Two batteries with 1.8 voltage and 10.5 Ohm internal resistance each are connected in series. This battery pack is used to boot a small electric motor with 275 Ohm resistance. Find the power delivered to the motor.
(a) Design a simple PNP current source to give an output current of IO = 0.5 mA (nominal value). The transistor parameters are f = 50, VEE = 10 V, VCC = 10V, |VBE| = 0.7 V, |VCEsat| = 0.3 V and VA = 50 V (for all transistors)
The cylindrical coaxial cable with the cross section shown below, has inner and outer radii of 5mm and 15mm respectively. The dielectric parameters are; er=2, signma=5*10^(-10) S/m and Ur=1
When working out the power dissipated you have the equationusing the same current (io) but this time you use anegative sign in the equation. How do you know when to use a positive or negative sign for this current in both situations
A material with a bulk resistivity of p = 120 Om is to be used to manufacture a 75 kO resistor that must dissipate P = 80 W of power. The maximum allowable current density for this material is J = 120 A/m2.
Design a multiplexer which has four input lines, two controllines, and one output line and a demultiplexer which has one input line, two control lines, and four output lines using truth tables and k-maps.
Build a series circuit consisting of a 130 V 60 Hz ac source, a 5 ohm resistor, a 53.05 mH inductor, and a 0.33156 mF capacitor. a) Draw the ac circuit diagram b) Sove for the phasor current and phasor voltages across each component.
1. Find the transfer function 2. Find the Laplace transformation of the output when x(t)=sin(t)u(t) 3.Find the output by taking the inverse Laplace transform of part 2.
a salient pole 60 Hz synchronous motor with a squirrel cage winding on the rotor which is used for starting purposes. (a) What is the frequency of the current in the squirrel cage rotor conductors immediately after the motor is energized (The motor..
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