What is the Difference Between Voltmeter and Multimeter?

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The main difference between a voltmeter and a multimeter lies in the range of measurements they can perform. Here are the key differences between the two devices:

  • Function: A voltmeter is designed to measure only voltage, while a multimeter can measure multiple quantities, such as voltage, current, resistance, and more.
  • Application: Voltmeters are used when you need to measure only voltage in an electric circuit, while multimeters are used when you need to measure other properties like current and resistance, along with voltage.
  • Design: Voltmeters are typically single-purpose devices, whereas multimeters combine the functions of various meters, such as voltmeters, ammeters, and ohmmeters, in a single unit.
  • Cost: Multimeters tend to be more expensive than voltmeters due to their multiple functions and components.
  • Versatility: Multimeters can be used to check transistors and diodes, while voltmeters cannot.

In summary, if you need to measure only voltage, a voltmeter is sufficient. However, if you want to measure voltage and other quantities like resistance and current, a multimeter is the better choice.

Comparative Table: Voltmeter vs Multimeter

Here is a table highlighting the differences between a voltmeter and a multimeter:

Parameter Voltmeter Multimeter
Purpose Measures only voltage (potential difference between two points in an electrical circuit) Measures multiple electrical quantities, such as voltage, current, resistance, frequency, and capacitance
Function Monitors voltage only Combines the functions of various meters, such as voltmeter, ammeter, and ohmmeter, in a single unit
Circuit Connection Cannot substitute a multimeter Can be used in place of a voltmeter
Transistor/Diode Testing Generally not used to test diodes or transistors Can be used to test diodes and transistors
Resistance Measurement Requires an ammeter to measure circuit resistance Can directly measure circuit resistance without an ammeter
Substitutability Cannot substitute a multimeter Can be used in place of a voltmeter
Price Comparatively cheaper More expensive due to multiple parts for measuring various parameters
Application Area Limited application area Wide area of applications due to the capability to perform multifarious functions

In summary, a voltmeter is a specialized instrument for measuring voltage, while a multimeter is a versatile device that can measure multiple electrical quantities, such as voltage, current, resistance, and frequency.