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Q. A 10-kVA transformer is known to have an iron loss of 150 W and a full-load copper loss of 250 W. If the transformer has the following load cycle, compute its all-day efficiency:
4 hours full load at 0.8 power factor
8 hours 75% full load at 1.0 power factor
12 hours 50% full load at 0.6 power factor
What are the Advantages of digital cameras Advantages of digital cameras over manual cameras include: no processing costs (As there is no need to develop film or make prints),
What is Key bouncing? Mechanical switches are used as keys in lots of the keyboards. When a key is pressed the contact bounce back and forth and settle down only after a littl
Q. An elementary two-pole rotating machine with uniform air gap, as shown in Figure, has a stator-winding self-inductance Lss of 50 mH, a rotor-winding self-inductance Lrr of 50 mH
Power up the "TIMS" unit by using the switch at the back. Connect the Pico Virtual Instrument (PicoScope) to the PC as per Appendix 1 On the "TIMS" unit, connect the 2 kHz (s
Q. What do you understand by major systems of a telecommunication network? Explain in detail the subscriber loop systems. Ans: Major systems of any telecommunication netw
what ternary alloy, composition and binary substrate can be used for an LED at 1.55 µm optical fiber windo
Explain n-type and p-type semiconductors. n - Type semiconductor: If small amount of pentavalent impurity (group V elements) is added to a pure semiconductor giving a large
residual voltage in potential transformer
Its not essential that a power plant uses only two rectifiers, it depends on the load there at the site and the capacity of the rectifier or SMPS. Assume the load at the site is 12
In the magnetic circuit shown in Figure (a) the coil of 500 turns carries a current of 4 A. The air-gap lengths are g 1 = g 2 = 0.25 cm and g 3 = 0.4 cm. The cross-sectional are
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