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Q. A practical voltage source is represented by an ideal voltage source of 30 V along with a series internal source resistance of 1.2 . Compute the smallest load resistance that can be connected to the practical source such that the load voltage would not drop by more than 2% with respect to the source open-circuit voltage.
Q. A 300-kVA transformer has a core loss of 1.5 kW and a full-load copper loss of 4.5 kW. (a) Calculate its efficiency corresponding to 25, 50, 75, 100, and 125% loads at unity
Q. A six-pole, double-layer dc armature winding in 28 slots has five turns per coil. If the field flux is 0.025 Wb per pole and the speed of the rotor is 1200 r/min, find the value
The subject of electrical measurements is such a large one that entire books have been written on the topic. Only a few basic principles will be introduced here. Practical measurem
limitations of thevinin''s theorem
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Two three-phase, 6.6-kV, wye-connected synchronous generators, operating in parallel, supply a load of 3000 kWat 0.8 power factor lagging. The synchronous impedance per phase ofmac
Q. Explain the high-frequency response of FET amplifier? The analysis for the high frequency response of the FET amplifier is almost the same as that of the BJT amplifier. The
Q. A current of 65 A is measured with an analog ammeter having a probable error of ±0.5% of full scale of 100 A. Find the maximum probable percentage error in the measurement.
Composition of FET The FET (field-effect transistor) can be constructed from several semiconductors, silicon being by far the most common. Several FETs are made with conventio
Q. Antinoise Systems — Noise Cancellation? Traditionally sound-absorbing materials have been used quite effectively to reduce noise levels in aircraft, amphitheaters, and other
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