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Difference between Ammeter and Voltmeter

Difference between Ammeter and Voltmeter

Electricity is all around us, and we use it in so many ways every day. It’s important to be able to measure the voltage and current of an electric circuit, in order to detect problems and ensure that devices are working safely. While there are many types of electrical meters, two of the most common are ammeters and voltmeters. In this blog post, we’ll take a look at the difference between these two meters, and how they’re used in electrical diagnostics. Stay safe out there!

What is Ammeter?

  • An ammeter is an electrical device used to measure the current in a circuit. It is usually placed in series with the circuit so that the current flowing through the ammeter is proportional to the current flowing in the circuit. Ammeters are used to measure currents from a few milliamps to several hundred amps. The range of an ammeter can be increased by using a shunt, which is a resistor placed in parallel with the ammeter. Ammeters can be either analog or digital.
  • Analog ammeters have a moving needle that indicates the current, while digital ammeters display the current as a number on a digital readout. Ammeters can be either AC or DC. AC ammeters measure alternating current, while DC ammeters measure direct current.
  • Most ammeters are AC ammeters because they can be used to measure both types of current. Ammeters are used in a variety of applications, such as measuring the starting and charging systems in cars, testing electrical circuits, and measuring currents in power supplies. Ammeters are essential devices for electricians and other professionals who work with electrical circuits.

What is Voltmeter?

  • A voltmeter is an instrument used for measuring the potential difference between two points in an electric circuit. Voltmeters are usually inserted in a circuit in order to measure the voltage drop across resistors, although they can be used to measure the EMF of a battery or other voltage source.
  • Voltmeter readings are affected by the presence of current, so it is important to use an appropriate technique when taking measurements. For example, if a voltmeter is connected in series with a resistor, the current will flow through the meter and the reading will be affected.
  • In order to take accurate readings, it is necessary to use a voltmeter that is designed for the specific application. Voltmeter accuracy is also affected by factors such as frequency and temperature. When selecting a voltmeter, it is important to consider the intended use and choose a device that meets the required specifications.

Difference between Ammeter and Voltmeter

Ammeters and Voltmeters are two devices that are used to measure different electrical parameters. An ammeter is used to measure current in a circuit, while a voltmeter is used to measure the voltage drop across a load. The ammeter is connected in series with the circuit, while the voltmeter is connected in parallel. The ammeter measures the current flowing through the circuit, while the voltmeter measures the potential difference between two points in a circuit.

An ammeter is more sensitive than a voltmeter, so it can be used to measure lower values of current. Voltmeters are less sensitive than ammeters and can be used to measure higher values of voltage. Ammeter reads current in amperes, while voltmeter reads voltage in volts.


A voltmeter is a tool used to measure voltage, while an ammeter measures current. In order to use either instrument correctly, it’s important to understand the difference between volts and amps. Volts are a measure of potential energy, while amps are a measure of electrical current. When using an ammeter, you need to know the resistance of the circuit in order to calculate the amps. By understanding these concepts, you can use either an ammeter or voltmeter to troubleshoot problems with your electrical system.

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