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Two transformers each rated 250-kVA, 11/2-kV and 50-Hz are connected in opendelta on both the primary and secondary.
(a) Find the load kVA that can be supplied from this transformer connection.
(b) A delta connected three-phase load of 250 kVA, 0.8 pf, 2 kV is connected to the low-voltage terminals of this openvoltage transformer. Determine the transformer currents on the 11 kV side of this connection.
A milling operation is performed on an NC machining center. Total travel distance = 300mm in a direction parallel to one of the axes of the worktable.
In a pn junction for which Na >> Nd, and the depletion layer exists mostly on the shallowly doped side with W = 0.3 µm, find Vo if Nd = 10^16 / cm³. Also calculate Qj.
Application: Radar cross section. A radar is used for navigational purposes. A fixed radar station transmits at 3 GHz and 100 kW. If the smallest ocean-going ship has a radar cross section of 200 m2 and the radar antenna gain is 15 dB, find the e..
Four l-byte numbers are stored in memory from addresses 0x0200 to0x0203. Write an AVR assembly program that counts the number of bits that are 0 ineach of these four bytes and stores the counts for each byte in memory from addresses0x300 to 0x..
Derive the relation between the liquid and gas concentration at any level in the tower, as at point P.- and prove the equation below;
There is a circuit with a 12V DC battery, 500mH inductor, a 45 ohm resistor, and a switch all in series. Suppose the switch has been closed for a very long time. What is the magnitude of the current through the inductor. Is it constant, increas..
Consider a DC series motordesigned to operate with VS = 200 V. Suppose the rotorresistance is 0.40 ohms. and the field coil resistance is0.10 ohms . An RPM measurement reveals that when the line currentis 35 A when the motor is spinning at n = 500..
What is the magnetic force on a square loop of current I placed in a uniformed magnetic field B with the plane of the loop perpendicular to the magnetic field. Explain
A generator uses a coil that has 110 turns and a 0.475 T magnetic field. The frequency of this generator is 43.0 Hz, and its emf has an rms value of 230 V. Assuming that each turn of the coil is a square (an approximation), determine the length of..
When is the spectrum of a periodic analog signal reproduced correctly via digital signal processing by means of FFT?
A 10 cm length of a K-band copper waveguide is filled with a dielectric material with er = 2.55 and tan f = 0.0015. If the operating frequency is 15 GHz, find the total loss through the guide and the phase delay from the input to the output of th..
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
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