volt +

1. A rudimentary primary battery that consists of a series of disks made of two different metals; such as, zinc and copper, stacked alternately with electrolytes, soaked cloth , or paper disks.
2. The first source of a steady electric current, a simple form of electric battery developed by Alessandro Volta in 1799.

It consisted of alternating zinc and silver disks separated by material soaked in brine or salt water.

The inclination of the head toward the stimulated side upon application of an electric current to the vestibular fibers of the eighth nerve.

Direct electric current produced by a chemical battery.

A technique for measuring current passing through an electrolytic solution while a series of voltages is applied.

1. A device to measure both volts and amperes.
2. An instrument that can function either as a voltmeter or as an ammeter.
3. A dual-purpose instrument that can measure both potential difference and electric current, usually in volts and amperes respectively.

1. An instrument that can measure current and voltage.
2. Any electrochemical technique in which a faradaic current passing through the electrolysis solution is measured while an appropriate potential is applied to the polarizable or indicator electrode; for example, polarography.
3. A method of determining the chemical makeup of a sample substance by measuring electrical activity, or the accumulation of chemicals, on electrodes placed in the substance.

Voltammetry is often used to determine the amount of trace metals and toxins in water or other solutions.

A device that measures the apparent power in an AC circuit.

The unit of reactive power which is equal to the reactive power in a circuit carrying a sinusoidal current when the product of the root-mean-square value of the voltage, expressed in volts, by the root-mean-square value of the current, expressed in amperes.

A unit of electrical power equivalent to 1 watt or one thousandth of a kilowatt.

1. An instrument used to measure differences of electric potential, commonly called voltage, in volts or units that are multiples or fractions of volts.
2. A tool that measures electrical voltage; for example, the potential difference between two points.
3. A device; such as, a galvanometer, that measures in volts the differences in potential between different points of an electrical circuit.
3. A device that measures voltages of either direct or alternating electric current on a scale usually graduated in volts; such as, millivolts or kilovolts.

The typical commercial or laboratory standard voltmeter currently in use probably employs an electromechanical mechanism in which current flowing through turns of wire is translated into the reading of the voltage.

Another type of voltmeter includes uses electrostatic fores and is the only voltmeter to measure voltage directly instead of by the effect of current.

A test instrument that has a number of different ranges for measuring voltage, current, and resistance.