(unit of measurement of electromotive force, or pressure, in an electrical circuit, or 'push', named for Alessandro Volta (1745-1827) renowned for his pioneering work in electricity)
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.
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.
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.
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.