power circuits

Average Power Associated with LCR Circuit in Series - In an electrical circuit, energy is supplied by the source of EMF, stored by the capacitive and inductive elements and dissipated in resistive elements. Conservation of energy requires that, at any particular time, ..

In an electrical circuit, energy is supplied by the source of EMF, stored by the capacitive and inductive elements and dissipated in resistive elements. Conservation of energy requires that, at any particular time, the rate at which energy is supplied by the source of EMF must equal the r..

>The earth wire is much thicker in size and is made of copper. One end of it is connected to a copper plate buried deep under the earth. The earth connection is made to the electric meter and then to the main switch. In our homes, we receive supply of electric power through a main supply ..

Electric power is usually generated at places which are far away from the places where it is consumed. At the generating station, the electric power is generated at 11,000 volts. This voltage alternates at a frequency of 50 H..

Electric power is usually generated at places which are far from the places where it is consumed. Distribution of Electricity from Grid The power is transmitted over long distances at high voltage to minimize the loss of energy during transmission. For a given electric powe..

P = E r m s I r m s cos q . The product E r m s I r m s is called apparent power, whereas the P is called the true power. The term cos f is called the power factor. The current through pure L or pure C, which consumes no power for its maintenance in the ..

For a pure resistance in AC circuit q = O therefore in r = Erms I r m s The shaded portion in the graph indicates that power delivered to the a.c circuit by the source of e.m.f is maximum and the circuit is purely resistiv..

is contamination by extraneous signals from human sources, other transmitters, power lines and machinery, switching circuits, etc. Interference occurs most often in radio systems whose receiving antennas usually intercept several signals at the same time. Radio-frequency interf..

If too many electrical appliances of high power rating (like electric iron, water heater etc) are switched on at the same time, they draw an extremely large current from the circuit. This condition is called overloading and it can cause overheating of the wiring and lead to a f..

When a pure capacitance is contacted in AC circuit f = 90 o or r = 0. i.e., Average power supplied to an ideal capacitor by the source over a complete cycle of A.C. is also zero. ..