Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).

Electrical resistance (or simply resistance) is a measure of the opposition of a medium to the movement of charges inside of it. It is measured in ohms (Ω). The voltage or potential difference is the amount of energy per unit of charge needed to move charges between two points of a circuit.

Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). The larger resistance, the greater the barrier against the flow of current.

Resistance is a measure of how hard it is for electricity to pass through a component. And it happens because the negatively charged electrons are colliding with the positive ions in the metal, transferring energy to them. The more collisions, the higher the resistance.

All objects have some resistance, except superconductors. Resistance, discovered by Georg Simon Ohm in 1827, is the ratio between voltage and current. Ohm's law said that the voltage between any two points in a conductor changes directly as the current between the two points, given the temperature remains the same.