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Q. A transformer has its maximum efficiency of 0.9800 when it delivers 15 kVA at unity power factor. During the day it is loaded as follows:
12 hours 2 kW at power factor 0.5
6 hours 12 kW at power factor 0.8
6 hours 18 kW at power factor 0.9
Determine the all-day efficiency.
Q. Show Effects of Saliency and Saturation? Because of saliency, the reactancemeasured at the terminals of a salient-pole synchronousmachine as opposed to a cylindrical-rotor m
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Q. Two wattmeters are used, as shown in Figure, to measure the power absorbed by a balanced delta-connected load. Determine the total power in kW, the power factor, and the per-pha
What is tunnel effect? Discuss the Alpha decay as an example of tunnel effect. Prove that tunneling increases on decreasing the height and width of the barrier. Explain what do you
Q. For a part of the network shown in Figure, given that i 1 = 4A; i 3 (t) = 5e -t , and i 4 (t) = 10 cos 2t, find v 1 , v 2 , v 3 , v 4 , i 2 , and i 5 .
Construct a full wave bridge rectifier circuit and connect it to the transformer output. What is the Output Voltage and Frequency?
Design a low noise amplifier using an Infineon RF transistor BFP640. The amplifier is to be used to amplify the L2 GPS signal and so the centre frequency is 1227MHz and bandwidth 4
Consider a simple zener voltage regulator with the circuit diagram shown in Figure (a). (a) For a small reverse resistance R Z S and V S - R S i out > V Z , show that v ou
a) Give four features that were traditionally reserved to RISC architectures? b) Determine the overall throughput for 21 sequential instructions assuming a four-stage pipeline a
in DC series generator we consider Eg=V+Ia(Ra+Rse).But in DC shunt generator why it is only Eg=V+IaRa and not Eg=V+Ia(Ra*Rsh/Ra+Rsh)
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