Unit of Electric Current the Ampere

When electric current flows along parallel conductors, a magnetic force is produced between them. The metric unit of electric current, the AMPERE, A, is the constant current which, if maintained in each of two parallel conductors of infinite length and 1 meter apart in a vacuum, would produce between them a force of 2 X 10 newton/meter of conductor length (exactly). 

The unit of electrical current, the ampere, is named after Andr6 Marie Ampere (1775-1836), a French mathematician and physicist whom history credits with the invention of the galvanometer (a device that measures electrical currents). 

The quantity of electric charge is measured m coulombs, and the unit of electric current—the number of coulombs per second that go past any point— is the ampere (A), named after French physicist Andre Marie Ampere ... 

It is well to remember that in the past, the unit of electrical current—the international ampere—was defined as the strength of an invariant current which, when sent throngh a silver nitrate solution, would deposit l.lllSOOmg silver at the cathode. Today, another definition of the ampere as an SI unit is valid. 

The ampere. A, is the unit of electric current. One ampere is the current involved in the passage past any point of 1 coulomb per second 1 A = 1 C/s. 

The units important for the discussion of electrochemistry in this chapter are presented in Table 14-1. The passage of electrons through a wire or the passage of ions through a solution constitutes an electric current. The basic unit of electric charge is the coulomb, C. The unit of electric current is the ampere, A. The passage of 1 C/s is a current of 1 A. 

The International System of Units (SI) built on seven base units the unit of mass is the kilogram, the unit of time is the second, the unit of length is the meter, the unit of electric current is the ampere, the unit of tempera-... 

AMPERE (A). The constant current that if maintained m two straight parallel conductors that are of infinite length and negligible cross section and are separated from each other by a distance of I meter in a vacuum, will produce between these conductors a force equal to 2 x 10-7 newton per meter of length. (The SI unit of electric current.)... 

Andre-Marie Ampere created a mathematical theory in the 1820s for magnetic fields and electric currents. The SI unit of electrical current is named after him. 

One coulomb per second is the unit of electric current, and is called the ampere. From the loss of weight of the anode and the elapsed time, calculate the current that flowed through the cell on the assumption that it was uniform during that time. 

When described in terms of four base units, they are taken as the cm, g, s, and the unit of electric current, which we call the (emu of current). This is chosen to be of such a magnitude that p 0(ir) = 1 cm g s 2 (emu of current)" 2. An equivalent definition of the emu of current is that the force between two parallel wires, 1 cm apart in a vacuum, each carrying 1 emu of current, is 2 dyn per cm of wire. Comparison with the definition of the ampere then shows that 1 (emu of current) = 10 A. Other units are derived from these four by the usual rules.2... 

Ampere the unit of electric current equal to one coulomb of charge per second. (11.7)... 

Current ampere. A, the SI base unit of electric current -> Charge coulomb, C = As, the SI derived unit of charge Energy joule, J = kg-m s , the SI derived unit of energy Potential volt, V = JC" , SI derived unit of the cell potential... 

Coulomb Unit of electric charge the amount of charge that passes a given point when 1 ampere of electric current flows for 1 second. 

Ampere. The unit of electric current, equal to 1 coulomb per second. 

Such a definition of the ampere could be The ampere, unit of electric current, is such that the elementary charge is 1.60217653 x 10 coulomb. This definition determines the ampere, because in principle at least, one could count the number of electrons passing through a surface, and since the amount of charge carried by each electron would be known, the current would also be known. One of the consequences of this definition is that the electric constant eo and the magnetic constant ro would no longer be exact quantities, but would be defined by experiment through the expressions... 

The basic SI units of mass, length and time are the kilogram (kg), metre (m) and second (s). The basic unit of thermodynamic temperature is the kelvin (K), but temperatures and temperature differences may also be expressed in degrees Celsius (°C). The unit for the amount of substance is the mole (mol), defined as the amount of substance which contains as many elementary units as there are atoms in 0.012 kg of carbon-12. Chemical engineers, however, are tending to use the kilomole (kmol = 10 mol) as the preferred unit. The unit of electric current is the ampere (A). 

The ampere is the basic unit of electric current. It is that current which produces a specified force between two parallel wires which are 1 meter apart in a vacuum. It is named after the French physicist Andre Ampere (1775-1836). kelvin [K]... 

Let us call to mind the analogy between the flow of electricity along a wire and the flow of water in a pipe. Quantity of water is measured in liters or cubic feet quantity of electricity is usually measured in coulombs (ampere seconds). Rate of flow, or current, of water, the quantity passing a given point of the pipe in unit time, is measured in liters per second, or cubic feet per second current of electricity is measured in amperes (coulombs per second). The rate of flow of water in a pipe depends on the difference in the pressures at the two ends of the pipe, with atmospheres or pounds per square inch as units. The current of electricity in a wire depends on the electric potential difference or voltage drop between its ends, which is usually measured in volts. The definitions of the unit of quantity of electricity (the coulomb) and the unit of electric potential (the volt) have been made by international agreement. 

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