HC Verma Chapter 45 Problem 4

Problem Statement

A semiconductor has conductivity 2.4e-2 ohm-1m-1. Find the resistivity.

Key Concepts

Resistivity is reciprocal of conductivity

Relevant Formulas

rho = 1/sigma

Step-by-Step Solution

rho = 1/sigma = 1/2.4e-2 = 41.7 ohm.m.

Final Answer

41.7 ohm.m

Tips and Tricks

Semiconductor resistivity decreases with temperature, unlike metals.

Common Mistakes

Always use SI units. Check energy conservation accounts for all forms.