Q:

What is a voltmeter used for?

A:

Quick Answer

A voltmeter is an instrument used to measure the voltage between two points in an electrical circuit. Some voltmeters register direct current while others measure alternating current.

Know More
What is a voltmeter used for?
Credit: Jenud CC-BY-2.0

Full Answer

There are two basic types of voltmeters: analog and digital, with digital being the more accurate of the two. An analog voltmeter is built with a galvanometer in series with a high resistance and the inter resistance of the voltmeter must be high. A digital voltmeter shows the voltage as numbers.

Voltmeters are used in a variety of different industries. They are common in laboratories and the automotive industry, and home electricians use them every day.

Learn more about Electricity

Related Questions

  • Q:

    How does a switch work on a circuit?

    A:

    A switch works by interrupting current flow around an electrical circuit. A basic switch is a binary device: it is either open (off) or closed (on). The simplest type of switch is one that comprises two metal strips that are brought into contact by a spring or some other form of actuating mechanism.

    Full Answer >
    Filed Under:
  • Q:

    How does a battery work?

    A:

    According to the MIT School of Engineering, a battery provides an electrical charge due to the chemical reactions that take place inside it once it is connected into an electrical circuit. When a circuit connects the positive and negative poles, the anode and cathode inside the battery react with the electrolyte medium separating the two, producing a flow of electrons. This creates an electrical current and provides power.

    Full Answer >
    Filed Under:
  • Q:

    How does a shunt resistor work?

    A:

    A shunt resistor works by measuring either direct or alternating current that flows in an electrical circuit through the voltage drop that is generated across the resistance. Also known as a current shunt or ammeter shunt, this precision device uses the principle of Ohm's Law, which is mathematically represented by the equation V = I x R, where "V" indicates voltage, "I" denotes current and "R" is resistance. The standard units for voltage, current and resistance are volts, amps and ohms, respectively.

    Full Answer >
    Filed Under:
  • Q:

    What is a common wire in an electrical circuit?

    A:

    A common wire is either a connecting wire or a type of neutral wiring, depending on the electrical circuit. When it works as a connecting wire, the wire connects at least two wires of a circuit together.

    Full Answer >
    Filed Under:

Explore