The equation for resistance is:

R=I/A

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.