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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. Let a square-wave voltage source having an amplitude of 5V, a frequency of 1 kHz, a pulse width of 0.5 ms, and an internal source resistance of 50 be applied to a resistive lo
ADD Instruction Op code format of ADD instruction is Replace the three bit code of the register R from to obtain the op code of the required ADD instruction . op co
Q. What is thermal runaway? State one method to prevent the same? The effect of changes in leakage current (ICO) and current gain(b) on the dc bias point is given by the equat
Octal Number Systems Now the question may arise in one mind that why to learn octal number system when neither human nor the digital systems uses. It hence it is
What is the power of the signal transmitted by powerful cell phones? Ans) The powerful cell phones can transfer a signal of 3 watts.
Shunt Capacitors Line losses owing to poor PF can be decreased through improving the PF. Overall improvement in the operating condition can be brought about through reducing t
Design a circuit using op-amp that will reject the 60kHz power line noise and also reject high signal frequency above 800Khz. The stop-band width around the 60kHz centre frequency
The variable resistor Z o in the circuit shown in Fig. 1 is adjusted until maximum average power is delivered to Zo. a) Find the value of Z o b) Calculate the maximum av
what is an useful life time in bathtub curve?
Rise Time (t r ) During rise time voltage falls from 90% V a to 10% where V a where V a is the initial anode voltage. In terms of current time taken by anode curre
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