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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
A three-phase, 4160 V, 60 Hz, 3000 kVA generator supplies the following three phase loads: A 00 kVA at .7 pf lagging, D 00 kVA at .9 pf lagging, and C 50 kVA at unity pf.
A three stage switching structure is to accommodate N = 128 input and 128 output terminals. For 16 first stage and 16 last stage, verify the number of cross points for nonblocking.
Effect of Frequency a.From equation for given H p and μ P v α √f b.From equation the depth of penetration for a given material δ α 1/ √f c.From equation hyst
Define The universal property of NAND and NOR Gates? The NAND and NOR gates are called universal gates, because any gate can build by using these two gates. The univers
Mode 1 In this mode transistor Q gets turned on by the positive output of the PWM. After that current flows through inductor L transistor Q then back to supply in thi
Call Instructions Call instruction are used to call a subroutine program in assembly language procedure and functions are called subroutines. There are two types of calls i
Let a message signal m(t) have a bandwidth of 10 kHz and a peak magnitude of 1 V. Estimate the bandwidth, by using Carson's rule, of the signal u(t) obtained when m(t) modulates a
Q. Open-circuit and load characteristics of generator? The open-circuit and load characteristics of a separately excited dc generator, along with its schematic diagram of conne
Q. For a BJT with vBE = 0.7V, I CBO = 4 nA, i E = 1 mA, and i C = 0.9 mA, evaluate α, iB,iSE, and β.
Semiconductors Conductivity in among those of metals and insulators. Conductivity can be changed over orders of magnitude through changes in temperature, optical excitat
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