Current, voltage and resistance GapFill

Electricity is the movement of electrical charge, which has applications in every part of the modern world. The rate of flow of charge through a component is known as  powercurrentwork donepotential difference. The work done by this flow of charge per unit charge across a component is known as  potential differencecurrentflow ratepower. The ability of a component to impede the flow of charge is the  resistanceresistivitypowerstopping potential of the component. For a given material, without considering the dimensions of the component, this impedance is known as  resistivitypowerstopping potentialresistance of the material.

All of these quantities vary for components in a circuit.  An ohmic conductorA cellAn LDRA filament lamp is a component with constant resistance.  A filament lampA cellAn LDRAn ohmic conductor increases in resistance with increasing current.  A thermistorA semiconductor diodeAn LDRA cell has a very high resistance in one direction, so current only passes in one direction.  An LDRA cellA filament lampA thermistor is designed to have a resistance that decreases with temperature, while  a cella filament lampan LDRa thermistor has a resistance that depends on exposure to light.