Resistance

Resistance is the opposition or hindrance to the flow of an electrical current through a circuit or a medium. It is a property of a material that determines the amount of current that will flow through it when a voltage is applied. Resistance arises due to the collision of free electrons with atoms in the material, which causes them to lose some of their kinetic energy, thereby reducing the flow of current. Resistance is an essential property of electrical conductors and is required for the functioning of various electrical devices. It is also used for regulating the flow of currents in a circuit and for measuring various electrical parameters.