The expected energy of the electrons at absolute zero is called

Which of the following statements is true?

When the electrical conductivity of a semiconductor is due to the breaking of its covalent bonds,then the semiconductor is said to be

At room temperature,in a semiconductor material:

If $V_0$ is the volume of a standard unit cell of germanium crystal containing $N_0$ atoms,then the expression for the mass $m$ of a volume $V$ in terms of $V_0, N_0, M$ and $N_A$ is [here,$M$ is the molar mass of germanium and $N_A$ is the Avogadro's constant].

The forbidden energy gap for a germanium crystal is approximately ....... $J$.