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Showing posts with the label AC

EMF, Potential difference, Electrical power, Types of supply

Electromotive force:-       Causes an electric current to flow in an electric circuit. Potential difference:-             Difference between electrical potential of two points which tends to cause flow of electrons between them.             Electrical potential of a point can be measured by the amount of work done in bringing a unit positive charge form infinity to that point.               Unit : volt (V). Electrical power:-           Work done by the electrical instruments per a unit time.            P= W/t            Unit: Watt Types of electrical power supply:- 1 .        DC Supply:            Polarity of the current/voltage/power of a source remains same with respect to time.           Example: Current available from batteries and solar cell is of DC Current. 2.        AC Supply:            Magnitude and polarity of the current/voltage/power of a source changes periodically with respect to time.     Example: Electri