Manish Kumar Saini has Published 773 Answers

Working Principle of Voltaic Cell (Galvanic Cell)

Manish Kumar Saini

Manish Kumar Saini

Updated on 29-May-2021 14:35:50

A Voltaic cell is an electrochemical cell that converts the chemical energy of spontaneous (natural) redox reactions into electrical energy. The Voltaic cell is also called as Galvanic cell.The voltaic cell is named after its inventor Alessandro Volta in 1799.In redox (oxidation-reduction) reactions, the electrons are moved between two different ... Read More

Wattmeter – Types and Working Principle

Manish Kumar Saini

Manish Kumar Saini

Updated on 29-May-2021 14:28:33

A wattmeter is an instrument which is used to measure electric power given to or developed by an electrical circuit. Generally, a wattmeter consists of a current coil and a potential coil.Types of WattmeterElectrodynamometer wattmeter – for both DC and AC power measurementInduction wattmeter – for AC power measurement onlyWorking ... Read More

Unijunction Transistor – Construction, Working Principle, and Characteristic Features

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:46:44

A Unijunction Transistor (UJT) is a three-terminal semiconductor device. The main characteristics of UJT is when it is triggered, the emitter current increases re-generatively until it is limited by emitter power supply. Due to this characteristic feature, it is used in applications like switching pulse generator, saw-tooth wave generator etc.Construction ... Read More

Full Wave Rectifier

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:43:57

Full Wave Rectifier is a diode circuit which is used to transform the complete cycle of Alternating Voltage (AC Supply) to Direct Voltage (DC Supply).In full wave rectification, current flows through the load in the same direction for the complete cycle of input AC Supply.Types of Full Wave RectifiersCentre Tap ... Read More

Transistor as a Switch

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:41:19

A transistor can be used as a solid state switch. If the transistor is operated in the saturation region then it acts as closed switch and when it is operated in the cut off region then it behaves as an open switch.The transistor operates as a Single Pole Single Throw ... Read More

Transistor Amplifier – Working Principle and Applications

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:38:16

Transistor as an AmplifierA transistor can increase the strength of a weak signal and hence it can be used as an amplifier in a circuit. The weak signal is applied between the emitter – base junction and output is taken across the load connected in the collector circuit.In order to ... Read More

Silicon Controlled Rectifier – Working Principle and Applications

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:37:25

An SCR is a three-terminal, three-junction, and four-layer semiconductor device that is used to perform switching functions in power circuits.Sometimes the SCR is also called as Thyristor.Constructional Details of SCRThe SCR has three pn – junctions, and four layer of p and n type semiconductor joined alternatively to get pnpn ... Read More

Resistors in AC Circuits

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:36:21

Important TermsAC Circuit − A closed path followed by alternating current is called as an AC Circuit.Resistance − The measure of opposition offered by a material in the path of electric current is known as resistance of that material. The element possessing the resistance is known as Resistor.Peak Value of ... Read More

PN Junction Theory of Semiconductor Diode

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:35:05

When a p–type semiconductor is suitably joined to n–type semiconductor, the contact surface of the semiconductors is called as pn–junction.Properties of pn – junctionThe p–type semiconductor has holes and the n–type semiconductor has free electrons as the majority charge carriers. When both p–type and n-type materials are suitably joined together ... Read More

Physical Limitations of Operational Amplifiers

Manish Kumar Saini

Manish Kumar Saini

Updated on 26-May-2021 15:34:04

A practical operational amplifier exhibits some limitations that should be considered in the design of instrument.The Physical Limitations of Operational Amplifier −Voltage Supply LimitationsFinite Bandwidth LimitationsInput Offset Voltage LimitationsInput Bias Current LimitationsOutput Offset Voltage LimitsSlew Rate LimitationShort Circuit Output LimitsLimited Common Mode Rejection RatioVoltage Supply LimitationsAn operational amplifier is power ... Read More

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