Question

Define the term electrical resistance.​

Answer 1

Answer:

Resistance is a measure of the opposition to current flow in an electricalcircuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). ... Insulators: Materials that present high resistance and restrict the flow of electrons.

Answer 2

GiveN :-

• To define the term electrical resistance.

SolutioN :-

Electrical resistance can be defined as the ability e of a material to resist the flow of charge through it . The resistance of a conductor of uniform thickness depends on the length of the conductor and area of cross section.

That is ,

$\sf:\implies \gray{ R \propto \pink{\ell ength }} \\\\\sf:\implies\gray{ R \propto \dfrac{1}{\pink{Area}} }$

On combining these two equations :-

$\sf:\implies R \propto \dfrac{\ell }{A} \\\\\sf:\implies R = k \dfrac{\ell}{A}\\\\\sf:\implies \underset{\blue{\sf Resistance\ Formula}}{\underbrace{\boxed{\pink{\frak{ Resistance =\rho \dfrac{\ell}{A}}}}}}$