Unit 1 - Electrical properties of materials - Quiz 1

In solids, _________in outer most orbits of atoms determine its electrical properties

• protons

• neutron

• electrons

• positron

Free electron theory has been developed in ----------- main stages

• 1

• 2

• 3

• 5

This theory was developed by Drude & Lorentz in 1900

• Classical free electron theory

• Quantum free electron theory

• Zone theory

• Bloch theory

Sommerfield developed the quantum free electron theory in

• 1956

• 1900

• 1927

• 1928

According to this theory, free electrons move in a periodic potential provided by the lattice

• Classical free electron theory

• Quantum free electron theory

• free electron theory

• zone theory

In CFET, free electrons move in

• unidirection

• bidirection

• random direction

• one path

There is no loss of energy and resultant velocity is zero, this indicates ______ of free electrons

• inelastic collision

• elastic collision

• Direct compact

• Oblique impact

In QFET, Energy levels are

• discrete

• continuous

• discontinuous

• has increasing value

QFET follows

• Maxwell-Boltzmann distribution

• Bose-Einstein distribution

• Fermi-Dirac distribution

• Einstein-Kalam distribution

Electron occupying an energy level can be determined by

• probability function F(E)

• probability function Z(E)

• Normalized function F(E)

• Occupation function N(E)