Define 1 Ampere
This topic only explain the term definition of Ampere ( which is explain in different-different type . Students can learn it according to there needs. )
Ampere is the basic unit of electric current . It is named after Andre-Marie -Ampere a French scientist born in 1775 . He also known as the father of electrodynamics .
Definition of Ampere – 1 Ampere is the current flowing through a conductor when 1 Coulomb of charge flows through a conductors in unit time.
From Ohm’s law – potential difference across the conductor is directly proportional to the current flowing through the conductor , if V is the potential difference across the conductor and I be the current flowing through the conductor then according to Ohm’s law V α I or V= RI , where R is the resistance of the conductor . ( resistance of a conductor is the property of the conductor to restrict the flow of current through it) i.e. current I =V/R,
So we can say, 1 Ampere current flows through a conductor when unit potential difference setup across a conductor of resistance 1 Ohm .
Another definition of current can be determined using the property of force between two parallel current carrying conductor according to it force between two parallel current carrying conductor can be given as force per unit length (f/l) F= µ0I1 I2 /2Πd ( Here I1 and I2 are the current through the wires and , d is the separation between them . according to given relation we can define, 1 Ampere is the electric current which when flowing in each of parallel conductors placed at separation 1 m in vacuum exert a force of 2x 10-7N on 1 meter length of either wire.