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The resistance of a wire is 60 ? at 25 o C and 65? at 75 o C. Find the resistance of wire at 0 o C and value of temperature co-efficient at 0 o C. Ans: Given R 25 = 60 ? a
Status Signals There are three status signals IO/M s and s 1 . All these signals are output signals. IO/ M - it is a status signals used to distinguish whether the
Explain the terms dielectric constant and dielectric loss. Dielectric Constant or Permittivity: all insulating materials possess an electrical capacitance. The capacitance of
Two single-phase 60-Hz sinusoidal-source generators (with negligible internal impedances) are supplying to a common load of 10 kW at 0.8 power factor lagging. The impedance of the
the covers of electrical machine are made of
Q. Explain how phase angle measurement are carried out with vector impedance meter. Sol. Impedance measurements are concerned with both the magnitude (Z) and the phase
Multiple Tariff Meters or TOU Meters Time of use metering facilitates load control and planning on the part of utilities. This is efficiently achieved using a concept known as
Consider the circuit shown in Figure (a) in which the switch S has been in position 1 for a long time. Let the switch be changed instantaneously to position 2 at t = 0. Obtain v(t)
(a) Let a unit impulse of current i(t) = δ(t) be applied to a parallel combination of R = 3 and C = 1/2 F. Determine the voltage vC(t) across the capacitor. (b) Repeat (a) for
Define Series VAr Compensation? For very long transmission lines, the inductive reactance of the line becomes so high that not much power can be transmitted through the line, s
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