8V

8V refers to eight volts, a unit of electric potential difference. The volt (symbol V) is the SI unit for potential difference; by definition, one volt is the potential difference that would push one ampere of current through a resistance of one ohm (V = IR). Consequently, 8V is a voltage magnitude that can occur in both direct current (DC) and alternating current (AC) systems, depending on the source.

In practice, 8V may be produced by a battery pack, a regulated DC power supply, or an AC transformer output that is specified as 8V with a given frequency (for example 50 or 60 Hz as RMS). 8V DC is used in various hobby electronics, small appliances, and automotive or sensor circuits. An 8V battery is possible, typically formed from several smaller cells in series, such as four 2V cells in a lead-acid arrangement.

Safety and handling: because 8V is relatively low, it is generally considered safe to handle in most contexts, and the risk of electric shock is low. Nevertheless, power sources capable of delivering sizable current can heat conductors or cause damage in short circuits, so proper isolation and insulation practices should be followed.

Notes: In AC contexts, voltages may be specified as RMS (root-mean-square) values, and peak values will be higher by a factor of sqrt(2). 8V is not a standard global mains voltage, but it appears in various devices and experimental setups.

See also: volt, voltage, battery, power supply.