The volt (symbol: V) is the derived unit for electric potential, electric potential difference, and electromotive force. When voltage is used in a formula, it can be typeset in italics, e.g., V = 9 V {\displaystyle V=9\,{\text{V}}} , or written in cursive. Volt (V) Volt is the electrical unit of voltage. Ohm (Ω) In circuit diagrams, a voltmeter is represented by the letter V in a circle, with two emerging lines representing the two points of measurement. It measures the amount of electrical charge that flows in an electrical circuit per 1 second. Ampere (A) Ampere is the electrical unit of electrical current. A higher resistance means it is more difficult for electricity to flow. A higher current means more electricity is flowing. Resistance is how difficult it is for electricity to flow through something. The symbol for volts is V. Current is how much electricity is flowing through the circuit. 1V = 1J / 1C. Both electric potential and voltage are things we measure and the volt is the unit of measure for both. One volt is the energy of 1 joule that is consumed when electric charge of 1 coulomb flows in the circuit. The symbol for DC is generally indicated by a straight line and three dots beneath it, while the symbol for AC is a wavy line. 1A = 1C / 1s. The symbol for the unit volt is written with a V (9 volts or 9 V). The volt is named in honour of the Italian physicist Alessandro Volta (1745–1827), who invented the voltaic pile, possibly the first chemical battery. Some multimeters alternatively display DC voltage as DCV, and AC voltage as ACV— find these symbols on the dial, turn the knob to the type … Current is measured in amperes.

The symbol for amperes is A. Voltage is measured in volts.