Measurement of an Electric Current
Calculating the value of an Electric Current into three way-
1. According to the basic definition, an electrical current is measured by the electrical charge (q) is flowing through any cross section area of conductor in time (t).
I = ( q / t ) Coulomb/Sec or Ampere
2. And (n) number of free electrons are passing through conductor in time (t). From the number of flowing charge particle and time, current is measured by
I = [( n * e ) / t ] Ampere
Where, e = -1.6*10-19 Coulomb
3. According to the Ohm’s Law, an electric current is calculated by the voltage (V) and resistance (R).
I = ( V / R ) Ampere
From this above current calculator, you can easily find out the value.