Is voltage called strength of electric current? If not voltage then what is it?
1 Answer
Voltage is the force that creates a current. The ampere is the unit applied to the strength of an electric current measurement.
Explanation:
Ohm's Law, in equation form is voltage = current*resistance. There are 3 parameters that interact.
The voltage is also called electromotive force, or emf. The S.I. unit for emf is the Volt. "Force" is part of the name "electromotive force" because this is the force that encourages electrons to move (through attraction or repulsion) in a circuit.
The current is a measure of the rate of flow of electrons and therefore the rate of flow of electric charge - or Coulombs. The S.I. unit for current is Amps, which is equivalent to
Current and voltage are directly proportional in Ohm's Law.
The resistance is a characteristic of components in the circuit. It is constant in a particular circuit, so it is a "constant of proportionality" in Ohm's Law. Resistance resists the flow of electrons, so changing to a larger resistance in a circuit will decrease the current.
I hope this helps,
Steve
