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
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
Voltage is the difference of electrical potential between two points or two objects. Without this difference of electrical potential, electricity could not be used as a power source.Full Answer >
Electromotive force is the difference in electrical potential between two points that compels electricity to flow to an area of lower potential in order to equalize charge. According to the HyperPhysics website, the force is measured in volts and frequently abbreviated as "emf."Full Answer >
A voltmeter is used by attaching the positive and negative terminals of the voltmeter to the respective ends of the circuit to be tested and reading the results. Usually, the positive terminal of a voltmeter is red, and the negative terminal is black.Full Answer >
Resistance in AC and DC currents is the ability of a material, normally a circuit or a resistor, to oppose or restrict the flow of current through it. The amount of resistance that a material gives is referred to as an ohm. Several common materials with high resistance levels include wood, tungsten, air, glass and rubber.Full Answer >