# Current of Electricity

Last updated 5 years ago

Discipline:
Science
Subject:
Physics   Resistance is the ratio of the potential difference across the component to the current flowing through it. The SI unit of resistance is ohm(Ω)

The Electromotive Force of an electrical source is the work done by the electrical source in driving a unit charge around a complete circuit. The SI unit for Electromotive Force is Joules poer Coulomb(J/C) or Volt(V)

Electric Current is measured using an ammeter. The ammeter must be connected in series to the circuitPotential Difference is measured using a voltmeter. The voltmeter must be connected in parallel to the component accross which the potential difference is measured.

The free eletrons in a wire will not flow without any force. A source of energy is needed to force the electrons to start moving in a circuit. An electromotive force is responsible for the pumping action of the source of energy

Current of Electricity

Current is the rate of flow of ChargeThe SI unit for current is Ampere(A) or Coulomb per Second(C/s)

The Potential Difference across a component in a circuit is the work done to drive a unit charge through the component. The SI unit for Potential Difference is Joules per Coulomb(J/C) or Volt(V)