Question

what is a resistance ? on what factors resistance depend

Answer 1

Answer is in Attachment !

Answer 2

Resistance:

• It is the property of a conductor to resist the flow of charges through it.
• Its S.I unit is ohm (Ω).
• R = V/I  

Where, R = Resistance, V = voltage and I = current.

Factors on which the resistance of a conductor depends:

• Resistance depends on its length (L)
• Resistance depends on its cross sectional area (A)
• Resistance depends on the nature of material
• $\sf{R\propto \dfrac{L}{A}}$

• $\sf{R=\rho \dfrac{L}{A}}$

Where "ρ" (rho) is proportionally constant known as resistivity of the material of conductor.