In an $n$-type semiconductor, the Fermi energy level lies

How is electric conduction produced in an intrinsic semiconductor?

In an $n$-type semiconductor,the free electrons donated by the impurity atoms occupy energy levels in:

$A$ donor atom in a semiconductor has a loosely bound electron. The orbit of this electron is considerably affected by the semiconductor material but behaves in many ways like an electron orbiting a hydrogen nucleus. Given that the electron has an effective mass of $0.07 \, m_e$,where $m_e$ is the mass of the free electron,and the space in which it moves has a permittivity of $13 \, \varepsilon_0$,then the radius of the electron's lowermost energy orbit will be close to ................. $\mathring{A}$ (take the Bohr radius of the hydrogen atom as $0.53 \mathring{A}$).

When an $n$-type semiconductor is heated,

The charge on a hole is equal to the charge of