The equation for resistance is:
R=
where,
is the resistivity of the wire’s substance,
l is the wire’s length.
A is the cross-sectional area of the wire.
The resistance is inversely proportional to the area of the wire cross-section, as shown by the equation. As a result, the resistance increases as the wire becomes thinner, and vice versa. As a result, electricity flows more freely via thick wires than through thin wires.