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Background The towers support one or more overhead lines serving the energy distribution. Most frequently three-phase AC circuits are used r...

Phasors  The generator at the power station which produces our AC mains rotates through 360 degrees to produce one cycle of the sine wave...

Resistance in an AC Circuit  A resistor in an ac circuit behaves as it does in a dc one.   It opposes the flow of current. The higher the...

The Basic Opamp  The opamp was originally designed to carry out mathematical operations in analogue computers, such as bombsights, but wa...

Metal Oxide Semiconductor Fet (Mosfet)  The mosfet has the gate insulated from the substrate by a thin layer of silicon oxide, to prevent...