The unit of resistance in the context of basic electricity is the ohm, represented by the symbol "Ω". Resistance is a measure of how much a material or component opposes the flow of electric current through it. One ohm of resistance is defined as the amount of resistance that allows one ampere (1 A) of current to flow through it when a voltage of one volt (1 V) is applied across it.
In mathematical terms, Ohm's law relates resistance (R), current (I), and voltage (V) as follows:
=
×
V=I×R
Where:
V is the voltage across the component in volts (V).
I is the current flowing through the component in amperes (A).
R is the resistance of the component in ohms (Ω).
Resistance is a fundamental concept in electrical circuits and plays a crucial role in determining how much current flows through a component for a given voltage.