WKM +- 2.0% Accuracy Voltmeter for School and College Labs KT79

WKM +- 2.0% Accuracy Voltmeter for School and College Labs KT79 is an electrical instrument used to measure the voltage or potential difference between two points in an electrical circuit. It is an essential tool for electricians, engineers, and technicians working with electrical systems.

The primary function of a voltmeter is to measure the voltage across a component or a set of components in a circuit. It is connected in parallel to the component being measured, allowing it to measure the potential difference between the two points. The voltage is typically measured in volts, hence the name voltmeter.

Voltmeters can be analog or digital, depending on the type of display they use. Analog voltmeters have a needle that moves across a scale to indicate the voltage, while digital voltmeters have a digital display that shows the voltage in numerical form. Digital voltmeters are more commonly used nowadays due to their accuracy and ease of reading.

There are two types of voltmeters: direct current (DC) voltmeters and alternating current (AC) voltmeters. DC voltmeters are used to measure the voltage in circuits where the current flows in one direction, such as batteries or DC power supplies. AC voltmeters, on the other hand, are used to measure the voltage in circuits where the current periodically changes direction, such as in household electrical systems.

Voltmeters are designed to have a high input impedance, meaning they draw very little current from the circuit being measured. This ensures that the voltmeter does not affect the voltage being measured and provides an accurate reading. Additionally, voltmeters are equipped with a range selector switch that allows the user to select the appropriate voltage range for the measurement.

In conclusion, a voltmeter is an indispensable tool for measuring voltage in electrical circuits. It provides accurate readings of the potential difference between two points and helps ensure the proper functioning and safety of electrical systems. Whether it is an analog or digital voltmeter, it plays a crucial role in troubleshooting, maintenance, and design of electrical circuits.

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