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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
Q . Explain the working of Positive Clamper? Positive Clamper: The circuit for a positive clamper is shown in the figure. During the negative half cycle of the input signal,
This question investigates the effect of extending the data set with zero-padding & of the appropriate time in the workflow to apply a window function. To get finer resolution in t
The manufacturer of a 6V dry-cell flashlight battery says that the battery will deliver 15 mA for 60 continuous hours. During that time the voltage will drop from 6V to 4V. Assume
Amperes Circuital Law states that the line integral of the magnetic field H around a closed path equals the total current enclosed. ∫ H dl ∑ I App
The per-phase synchronous reactance of a three-phase, wye-connected, 2.5-MVA, 6.6-kV, 60-Hz turboalternator is 10. Neglect the armature resistance and saturation. Calculate the vo
Explain briefly the operation, draw the functions, formulas and observations. (i) Write an m-file "imnorm.m" which takes an image finds min and max values and uses them to nor
a shunt motor supplied at 230V rms runs at 900rev/min when the armature current is 30A.the resistance of the armature circuit is 0.4 ohms.find the armature input
Q. A60-Hz, 100-kVA, 2400/240-V(rms) transformer is used as a step-down transformer from a transmission line to a distribution system. Consider the transformer to be ideal. (a) F
explane the special features of dual beam?
Q. A negative impedance converter circuit shown in Figure is used in some applications where inductors cannot be utilized or where negative resistance is beneficial. (a) Determi
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