Question

find mathematical expression for resistivityof a material.

Answer 1

Answer:

https://goo.gl/search/Find+mathematical+expression+for+resistivity+of+a+material

Ohm: Definition & Formula | Study.com The mathematical relationship between resistance, voltage and current is given by Ohm's Law, which states that resistance (in ohms) is equal to voltage divided by current. ... Resistance (in ohms) is equal to the resistivity (in ohm-m) times the length of material divided by its cross-sectional area.