General Science question from JKAS Prelims, 2021 by JKPSC
Among the following theories which one is discuss about metal-free electrons?
Last updated Jun 24, 2026
Correct Answer:
Option D —
Drude-Lorentz theory
Understanding the Theory
The Drude-Lorentz theory was proposed to explain how metals conduct electricity and heat. It suggests that a metal consists of a lattice of positive ions (the atoms that have lost their outer electrons) submerged in a "sea" or "gas" of free-moving electrons.
Free Electrons: These are the outermost electrons of the metal atoms that are not tied to any specific nucleus. They are free to move throughout the entire volume of the metal.
Conductivity: Because these electrons are "free," they can move easily when an electric field is applied, which is why metals are such good conductors of electricity.
Heat Transfer: These free electrons also help in transferring kinetic energy, which explains the high thermal conductivity of metals.
Understanding the Theory
The Drude-Lorentz theory was proposed to explain how metals conduct electricity and heat. It suggests that a metal consists of a lattice of positive ions (the atoms that have lost their outer electrons) submerged in a "sea" or "gas" of free-moving electrons.
Free Electrons: These are the outermost electrons of the metal atoms that are not tied to any specific nucleus. They are free to move throughout the entire volume of the metal.
Conductivity: Because these electrons are "free," they can move easily when an electric field is applied, which is why metals are such good conductors of electricity.
Heat Transfer: These free electrons also help in transferring kinetic energy, which explains the high thermal conductivity of metals.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
