Voltmeter Working Principle
It works according to Ohm’s law. As per Ohm’s law, the voltage across a resistance is exactly proportional to the current passing through it. Basic meter shows a potential difference across its terminals with full-scale current running through it.
Voltmeter is always connected in a parallel manner to the element that would be examined for voltage, within a circuit. A DC voltmeter has a polarity symbol on it. In order to construct a meter deflection, link the positive (+) terminal of the voltmeter to one point with higher potential and negative (-) terminal up to another spot that has lower value.
An AC voltmeter consists of no polarity indications and can be connected to any case. In this instance too, the voltmeter is still connected in parallel to the component being observed. As shown in the figure below, a high-voltage range voltmeter is made by connecting series resistance with meter mechanism which has full scale voltage capabilities.
Voltmeter
Voltmeter is a measuring instrument designed to detect the potential difference between two points in an electric or electronic circuit. A voltmeter is commonly used for AC or DC circuits. Specialist voltmeters may also measure Radio Frequency (RF) voltage.
A device’s voltage can be measured using a voltmeter that is connected in parallel to the said device. This arrangement is significant since parallel objects usually tend to have the same potential difference. It is wired in parallel with the circuit, primarily due to similar voltage losses across it. In this article, we will discuss all the topics related to Voltmeter including its diagram, parts, formula, various types, working principle, how to use, etc.
Table of Content
- What Is a Voltmeter?
- Voltmeter Diagram
- Voltmeter Working Principle
- Types of Voltmeter
- How to Use a Voltmeter?
- Uses of Voltmeter