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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
Gold and silver are (A) Dielectric materials (B) Low resistivity conducting materials. (C) Magnetic materials. (D) Insulating materials. Ans: Gold and si
Q. Explain about 'Emitter Follower'? EMITTER FOLLOWER : An emitter follower circuit shown in the figure is widely used in AC amplification circuits. The input and output of the
Q. Radiation intensity pattern of Antennas? Antennas do not radiate power equally in all directions in space. The radiation intensity pattern describes the power intensity (whi
Q. What do you mean by digital systems? Electronics information is generally placed into two categories as digital and analog. The Digital information is represented in discret
Probelm: (a) Explain indexed addressing in 8051. (b) How does the 8051 distinguish between a byte address and a bit address? (c) How do open-loop and closed loop appli
Calibration and Testing of Energy Meters and Meter Laboratory Energy meters form a vital instrument of revenue realization for the distribution utilities. Based on the meter r
The block diagram for a 3-bit ripple counter is shown in Figure (a). Obtain a state table for the number of pulses N = 0 to 8, and draw a state diagram to explain its operation.
Question The diagrams below depict a modulation (left) and a demodulation(right). (a) Express y(t), u(t) and z (t). (b) What may happen to the demodulated signal y
Generation ofwide-band FM can be done by variousmeans.However, only themost common and conceptually the simplest one, known as the direct method, is considered here. It employs a
a. Determine how color sync burst and H deflection sync vary in amplitude and frequency. Also explain the difference in timing among the 3.58 MHz color sync burst and 3.58 MHz chro
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