The ampere is similar to other units in that it measures a specific physical quantity, in this case electrical current. It is a base unit in the International System of Units (SI) and is defined as the flow of electric charge across a given point in a circuit per unit of time. Just like the meter measures length and the kilogram measures mass, the ampere measures electric current.
Ampere IS the international standard unit for electric current.
Because you have to start somewhere - you can't derive ALL units. You have to have SOME fundamental units.For example, 1 ampere = 1 coulomb / second. That also means that 1 coulomb = 1 ampere x 1 second, or that 1 second = 1 coulomb / 1 ampere. In other words, you can derive any of the three units from the other two. In practice, for base units, units were chosen that can be measured with great precision.Another AnswerThe ampere is not a 'fundamental' unit; it is a base unit. The ampere was chosen as a base unit, because it relates electrical units to mechanical units, being defined, as it is, in terms of the force (which itself is defined in terms of base units) between current-carrying conductors.You might be getting confused because, quite wrongly, the ampere is often defined as a 'coulomb per second'. While it is certainly equivalent to a coulomb per second, it is not definedin this way.
You use the same units as for any other type of energy.You use the same units as for any other type of energy.You use the same units as for any other type of energy.You use the same units as for any other type of energy.
The base unit of electric current in the International System of Units is the ampere, commonly denoted as "A."
A coulomb per second is equivalent to an ampere, which is the unit for electric current.
Ampere IS the international standard unit for electric current.
ampere
Because you have to start somewhere - you can't derive ALL units. You have to have SOME fundamental units.For example, 1 ampere = 1 coulomb / second. That also means that 1 coulomb = 1 ampere x 1 second, or that 1 second = 1 coulomb / 1 ampere. In other words, you can derive any of the three units from the other two. In practice, for base units, units were chosen that can be measured with great precision.Another AnswerThe ampere is not a 'fundamental' unit; it is a base unit. The ampere was chosen as a base unit, because it relates electrical units to mechanical units, being defined, as it is, in terms of the force (which itself is defined in terms of base units) between current-carrying conductors.You might be getting confused because, quite wrongly, the ampere is often defined as a 'coulomb per second'. While it is certainly equivalent to a coulomb per second, it is not definedin this way.
ampere (A) or milliamp (mA)
A - ampere is the SI unit for current. But practically we use milli ampere (mA), micro ampere (,u A)
coulomb is the unit of charge and ampere is unit of current
Ampere is the unit of current.
The 2 units for measuring current are: Ampere Milliampere
You use the same units as for any other type of energy.You use the same units as for any other type of energy.You use the same units as for any other type of energy.You use the same units as for any other type of energy.
The base unit of electric current in the International System of Units is the ampere, commonly denoted as "A."
power: wattcurrent: ampere
ampere