Question

2. Which of the following is responsible for the conduction of electricity in metallic solids? (a) Free electrons (b) Anion and Cation (c) Electron-hole pair (d) Ionised particle​

Answer 1

Explanation:

Free electrons are responsible for current in the conductors. Free electrons are valance shell electrons having a weaker force of attraction between them and nucleus and so they are free to move in the metal conducting current in the metal (conductor).

Answer 2

(a) Free electrons is responsible for conduction in metallic solids.

Explanation:

• Conductivity in metal is a measure of a material’s ability to transmit heat, or electricity.

• Electrical conductivity in metals is a result of the movement of electrically charged particles.

• The atoms of metal elements are characterized by the presence of valence electrons, which are electrons in the outer shell of an atom that are free to move about. It is these "free electrons" that allow metals to conduct an electric current.

• Because valence electrons are free to move, they can travel through the lattice that forms the physical structure of a metal.

• Under an electric field, free electrons move through the metal much like billiard balls knocking against each other, passing an electric charge as they move.

• Conduction in metals must follow Ohm's Law, which states that the current is directly proportional to the electric field applied to the metal.