Ammeter Voltmeter connection | white board explanation | Electreca
A voltmeter, also known as a voltage meter, is an instrument used for measuring the potential difference, or voltage, between two points in an electrical or electronic circuit. Some voltmeters are intended for use in direct current (DC) circuits; others are designed for Alternating current (AC) circuits.
Voltmeters operating on the electrostatic principle use the mutual repulsion between two charged plates to deflect a pointer attached to a spring. Meters of this type draw negligible current but are sensitive to voltages over about 100 volts and work with either alternating or direct current.
An ammeter or Ampere meter is a measuring instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. The ammeter is usually connected in series with the circuit in which the current is to be measured. ammeter is an instrument for measuring either direct (DC) or alternating (AC) electric current, in amperes. An ammeter can measure a wide range of current values because at high values only a small portion of the current is directed through the meter mechanism. a shunt in parallel with the meter carries the major portion.
Types of an ammeter
1) Permanent moving coil ammeter: This ammeter is used for measuring direct current. ...
2) Moving iron ammeter: This is used for measuring both the currents alternating as well as direct current. ...
3) Electro-dynamometer ammeter: This instrument is again used for measuring both currents.
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