What is the name of the unit used to measure an electric current?
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An ampere is defined as the constant current which, if flowing through two parallel conductors of infinite length and negligible cross-section area situated one metre apart in a vacuum, would produce between these conductors a force equal to 2 x 10-7 newtons per metre of length.
An ampere is the basic unit of electric current or electromagnetic flow rate. In SI units, the amperage is measured in amps.
Electricity Basics
Types of electricity A hair dryer, an electric stove, a light bulb, a toaster-all these devices use electricity. Electricity is the flow of electrons through a conductor such as copper wire or aluminum. Electrons flow in one direction-from negative to positive. This flow is called electric current (or I). In a circuit, current flows from the negative terminal of the battery or power supply source to the positive terminal. The unit for measuring electric current is amperes (or A). We know that because electrons create magnetic fields around wires that can be detected by magnets placed nearby and because these magnetic fields have force, we can measure their strength using an ampere.