If the input to the circuit of figure is a sine wave. The output will be:
A simple equivalent circuit of the two-terminal network shown in the figure is:
A solenoid having cross-sectional area of 25 cm2. If solenoid has 80 primary turn/cm & 160 secondary turns over the circumference. Calculate the mutual inductance for the solenoid.
Which of the following are advantages of using bundled conductors?
(i) Reduced Reactance
(ii) Reduced Voltage gradient
(iii) Reduced surge impedance
In a four-unit insulator string, voltage across the lowest unit is 20kV and string efficiency is 85%.
The transmission lines voltage, will be:
Which relay is used for the protection of electrical machines against overheating?
The results of a slip test for determining direct axis (Xd) and quadrature axis
(Xs) reactance of a star connected salient pole are given below.
Vmax = 150V Imax =12 A
Vmin = 90V Imin =9 A
Hence the value of both reactance will be:
For a single phase 440/110 V transformer having input on primary side at no load is 100 W. The low voltage winding is kept open & the no load power factor is 0.4. Determine the active & reactive component of current at no load condition?
A single-phase energy meter which is designed to make 120 revolution for one unit of energy. What will be the number of revolution when a load connected to the energy meter which carrying a current of 30 A at 220 V supply at a power factor of 0.8 lagging when the meter is running for 2 hour?
In an A.C. bridge which is shown in figure below, if Z1 = 100 Ω,Z2 = (200 + j150)Ω &Z3 = (300 + j120)Ω,then find the unknown impedance Z4 if the bridge is in balanced condition.