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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
Explain Hall Effect. Hall Effect: If a current carrying conductor is placed in a magnetic field, a voltage is produced that acts in the perpendicular direction to the current
disadvantage of series & shunt clipper
Q. Define Power-Supply Rejection Ratio? An op amp's ability to disregard changes in power-supply voltage is measured by the power- supply rejection ratio (PSRR), which is speci
We have seen that a practical power source may be modelled by an ideal constant voltage source in series with a resistor - a Thevenin equivalent circuit Alternati
Q. Explain the conditions to be satisfied for sustained oscillations in an oscillator circuit with the help of block diagram. The essential condition for sustained oscillations
Singles Phase Half wave Controlled Rectifier with RL Load When gate pulses are applied to the thyristor at output voltage v0 follows the input voltage v s ( = V m sin ) s
Q. Define and explain the critical field circuit resistance and critical speed of a DC shunt generator. Ans. The OCC and R - line for a DC shunt generator. As, R f is
PUSH PSW Instruction It is similar to above push instruction but instead of normal register Paris it use PSW as its operand. Program status word comprises of the content
Buck Boost Converter The output of buck boost regulator may be less than or greater than the input voltage. Since the polarity of output voltage is opposite to that
Q. What is error-rate control? A system is said to possess error-rate damping when the generation of the output in some way depends upon the rate of change of the actuating sig
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