Q1. Define the electric resistivity of a material and also write its SI unit. 

Q2. Write a difference between maximum and minimum effective resistance. 

Resistivity is defined as resistance of a unit length of the conductor with unit area of cross section

 

SI unit:- ohm-meter

 

Maximum effective resistance is total possible resistance of the circuit (series combination is used to increase resistance)

Minimum effective resistance is the least possible resistance of the circuit (parallel combination is used to decrease resistance)