Difference Between Forward & Reverse Biasing

One of the major difference between the forward and the reverse biasing is that in forward biasing the positive terminal of the battery is connected to the p-type semiconductor material and the negative terminal is connected to the n-type semiconductor material, whereas in reverse bias the n-type material is connected to the positive terminal of…

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Transistor as an Amplifier

The transistor raises the strength of a weak signal and hence acts an amplifier. The transistor amplifier circuit is shown in the figure below. The transistor has three terminals namely emitter, base and collector. The emitter and base of the transistor are connected in forward biased and the collector base region is in reverse bias.…

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Difference Between Alternator & Generator

The major difference between the alternator and the generator is that in alternator the armature is stationary and the field system rotates whereas in the generator armature rotates and field is stationary. The armature of the alternator is mounted on the stationary element called stator and field winding on a rotating element. While the connection…

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Transistor

Definition: The transistor is a semiconductor device which transfers a weak signal from low resistance circuit to high resistance circuit. The words trans mean transfer property and istor mean resistance property offered to the junctions. In other words, it is a switching device which regulates and amplify the electrical signal likes voltage or current. The…

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Difference Between Volts & Watts

One of the major difference between volts and watts is that the volt is the SI unit of potential difference and electromotive force, whereas the watt measures the SI unit of power. The other differences between them are explained below in the comparison chart. Both the volts and watts are related to each other. The…

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Primary & Backup Protection

Primary Protection The main protection or primary protection is the first line protection which provides quick-acting and selective clearing of a fault within the boundary of the circuit section or element it protects. The main protection is provided in each section of an electrical installation. Backup Protection The backup protection provides the back up to…

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Transposition of Conductors

Definition: The transposition is a physical rotation of the conductors so that the conductor is moved to take up the next physical position in the regular sequence. The transposition of the conductor equalises the mutual inductance and capacitance between the lines. The irregular spacing between the conductor gives a complex value of inductances which makes…

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Sequence Impedance

The sequence impedance of the network describes the behaviour of the system under asymmetrical fault conditions. The performance of the system determines by calculating the impedance offered by the different element of the power system to the flow of the different phase sequence component of the current. Every power system component (static or rotating) has…

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Difference Between NPN & PNP Transistor

One of the major difference between the NPN and PNP transistor is that in NPN transistor the current flows between collector to emitter when the positive supply is given to the base, whereas in PNP transistor the charge carrier flows from emitter to collector when negative supply is given to the base. The NPN and…

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Single Line Diagram of 11kV Substation

Substation provides the energy supply for the local area in which the line is located. The main function of the substation is to collect the energy transmitted at high voltage from the generating station and then reduce the voltage to an appropriate value for local distribution and gives facilities for switching. The substation is of…

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