Crowdly

none uniform due to the positions of the valence electrons

none uniform due to the presence of the ionic cores

uniform due to equal number of positive and negative charges

Current density J observed in a conductor, when subject to a constant electric field

Depends on the cross sectional area of the conductor but is independent of its length.

Decreases when the length of the conductor is increased

Is independent of the length as well as the cross sectional area of the conductor

Increases when the cross-sectional area of the conductor is increased

Upon heating a sloid, the atoms of the solid

Vibrate unconstrained by their neighboring atoms

Maintain the same mean position of vibration

Increase there amplitude of vibration

Decrease the mean position of vibration

The number of free electrons in a metallic solid is

A small fraction of the total number of atoms in the solid

A small fraction of the total number of electrons in the solid

Equal to total number of electrons in the solid

Is independent of the number of atoms in the solid

The atoms in a metal behave as though

They can move like liquids

They are fixed in position but can move about in a limited manner based on conditions

They are rigidly fixed and can never be moved from their positions

They form an ideal gas