$A$ piece of semiconductor is connected in series in an electric circuit. On increasing the temperature,the current in the circuit will

The forbidden energy gap in $Ge$ is $0.72 eV$. Given $hc = 12400 eV-Å$. The maximum wavelength of radiation that will generate an electron-hole pair is: (in $Å$)

$Sn, C, Si$,and $Ge$ are all group $XIV$ elements. Yet,$Sn$ is a conductor,$C$ is an insulator,while $Si$ and $Ge$ are semiconductors. Why?

The upper level of the valence band and the lower level of the conduction band overlap in the case of

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 energy gap of silicon is $1.14 \ eV$. The maximum wavelength at which silicon will begin absorbing energy is.....$\mathring A$