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Two single-phase transformers, rated 1000 kVA and 500 kVA respectively, are connected in parallel on both HV and LV sides. They have equal voltage ratings of 11 kV/400 V and their per unit impedances are (0.02 + j 0.07), and (0.025 + j 0.0875) Ω respectively. What is the largest value of the unity power factor load that can be delivered by the parallel combination at the rated voltage?
A 75 kW, 8 pole star connected induction motor operates froma 415 V, 50 Hz supply and draws 140 A when supplying full load.Determine: 1. the synchronous speed Ns;
if we have an amplifier whose spec. is 2nV/rtHz and the bandwidth of the amplifier extends from 100Hz to 10kHz, and the gain of the amplifier is 5, how much noise should we expect at the output of the amplifier
A pump has a displacement volume of 98.4 cm3. It delivers 0.00152 m3/s of oil at 1000 rpm and 70 bars. If the prime mover input torque is 124.3 N.m, a. What is the overall efficiency of the pump b. What is the theoretical torque required to operate..
Determine the current through the source resistor Rs of each network of given figure using either mesh or nodal analysis. .
Describe the performance differences between an AM and FM system. Be sure toinclude parameters suchas: Power efficiency, spectral efficiency,noise immunity,and performance.
What conclusions can you draw about phase measurements in RC, RL, and RLC circuits? How does the phasechange as a function of the capacitance and inductance, and why What is the best technique for experimentally measuring
Two positive charges of 250 microcoulombs each are 20cm apart. Determine the electric potential halfway between them.
find an s-domain transfer function that has a specified frequency response and answer and discuss the following questions: 1. What determines the "order" of a transfer function 2. Given a transfer function, how is its frequency response calculated
Show by means of a drawing what happens if the charge is moved from the center plane toward the upper plane so that it is at a distance b from the upper plane and a distance c from the lower plane while the radial distance is maintained (point B).
Assume that your grades will be lower than expected at the end of the semester, and write out a strategy for recovering from these low grades.
A 50 µF capacitor, when connected in series with a coil having 40 ohms resistance, resonates at 1000 Hz. Find inductance of the coil. Also obtain the circuit current if the applied voltage is 100 V.
A natural gas power plant has a condenser that extracts 18,000 Btu/kg of natural gas. Compute the mechanical energy of the turbine and the overall system efficiency.
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