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In SI, the unit of electric current, the ampere (A), was historically defined such that the magnetic force exerted by two infinitely long, thin, parallel wires 1 metre apart and carrying a current of 1 ampere is exactly 2 × 10 −7 N/m.
The SI unit of current is ampere which measures the flow of electric charge across a surface at the rate of one coulomb per second. Since the charge is measured in coulombs and time in seconds, so the unit is coulomb/Sec (C/s) or amp.
The CGS unit of \(\text{G}\) is the gauss (\(\text{G}\)), and 1 \(\text{G} = 10^{-4} \text{T}\). It is usually held that \(\kappa\) is a dimensionless number, so that \(B\) and \(H\) have the same dimensions, and, in free space, B and H are identical.
Gaussian units constitute a metric system of physical units. This system is the most common of the several electromagnetic unit systems based on cgs (centimetre–gram–second) units. It is also called the Gaussian unit system, Gaussian-cgs units, or often just cgs units.
The Gaussian system of units is sometimes called the cgs system because it uses the centimeter, gram, and second as the base mechanical units.
21 Ιουν 2021 · The electric field is measured in stat-Volts/cm where 1 stat-Volt is equal to 299.8 Volts; (yes, these are the same significant figures as occur in the speed of light!). An electric field of 1 stat-Volt/cm (sometimes stated as 1 esu/cm) is approximately equal to 30,000 Volts/m.
There are CGS electrostatic units (esu), to be used in electrostatics; CGS electromagnetic units (emu), to be used for describing magnetic quantities; and gaussian mixed units.
