Holes are charge carriers in

$A$ semiconductor doped with a donor impurity is

Which impurity is doped in $Si$ to form an $N$-type semiconductor?

If a semiconductor has an intrinsic carrier concentration of $1.41 \times 10^{16} \, m^{-3}$,when doped with $10^{21} \, m^{-3}$ phosphorus,then the concentration of holes at room temperature will be

If $n_e$ and $n_h$ are electron and hole concentrations in an extrinsic semiconductor and $n_i$ is the intrinsic carrier concentration, then:

The semiconductors are generally