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Q. A 75-kVA transformer has an iron loss of 1 kW and a full-load copper loss of 1 kW. If the transformer operates on the following load cycle, determine the all-day efficiency:
8 hours full load at unity power factor
8 hours no load
8 hours one-half full load at unity power factor
A circular ring of magnetic material has a mean length of 1m and a cross sectional area of .001m^2.A sawcut of 5mm width is made in the ring . calculate the magnetizing current req
Determine the equivalent resistance of circuit: Determine the equivalent resistance of network across the source terminals and find the current drawn from the source.
Q. Consider the op-amp circuit of Figure. Sketch the waveforms of v S and v o , if v S is a sinusoidal voltage source with a peak value of 2.
Applications of TV picture TUbe
Q. What is Segment displays? Seven-segment displays are the most commonly used numeric display devices, while 10- and 16-segment (starburst) display devices are also available.
industrial approach of speed control of dc series motor
Q. Explain the working of spectrum analyzer and its applications. OR Draw block diagram of spectrum analyzer and explain its operation write down its importance applica
Define Series VAr Compensation? For very long transmission lines, the inductive reactance of the line becomes so high that not much power can be transmitted through the line, s
What is the effect of overheating on the life of an electric insulator? An insulator is designed to withstand amount of heat. However, when an insulator is overheated so dielec
Give the operating modes of 8259a? (a) Automatic Rotation (b) End of Interrupt (EOI) (c) Fully Nested Mode (d) Automatic EOI Mode (e) Specific Rotation (f) Edge
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