Universal Relay Torque Equation

The universal torque equation explains the working of an electrical relay. The relay has some arrangement of electromagnetic. These electromagnetic consist current and voltage windings. The current through the winding produces magnetic flux. And the torque is produced by the interaction of the flux of the same winding or between the flux of both the windings. If …

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NPN Transistor

Definition: The transistor in which one p-type material is placed between two n-type materials is known as NPN transistor. The NPN transistor amplifies the weak signal enter into the base and produces strong amplify signals at the collector end. In NPN transistor, the direction of movement of an electron is from the emitter to collector region due …

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Difference Between kW & kWh

The most significant difference between the kW and kWh is that the KW measure the power generate and utilise by the devices, whereas the kWh measure the energy consumed by the electrical equipment. The other differences between kW and kWh are explained below in the comparison chart. The word demand shows the kW, and the word …

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Common Emitter Amplifier

The common emitter NPN amplifier circuit is shown in the figure below. The source VBB is applied to the input circuit in addition to the signal. The VBB battery provides the forward bias voltage to the emitter-base junction of the transistor. The magnitude of the forward bias voltage should be such that it should keep …

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