Question

What causes resistance?

Answer 1

Resistance

1. Resistance is estimated by the opposition to the flow of current in an electric circuit.
2. Resistance is measured in ohm($\Omega$).
3. Resistance is determined by the formula$R=\rho \frac{l}{A}$, where $l$ is the length of wire, $A$ is the area of the cross-section of wire, and $\rho$ is known as resistivity.
4. Resistance of any wire relies upon the length of the wire, area of the cross-section of the wire, and material of the wire.

Causes of resistance

1. When the electrons flow in the circuit, they collide with each other and oppose their movement.
2. This collision leads to the obstruction in the flow of electrons and causes the resistance