When the conductivity of a semiconductor is only due to the breaking of covalent bonds,the semiconductor is called:

$P$-type semiconductors are made by adding which impurity element?

Which statement is correct regarding the charge of doped semiconductors?

$A$ hole in a $P-$type semiconductor is

Which of the following when added as an impurity into silicon produces $n-$type semiconductor?

What is the conductivity of a semiconductor sample having electron concentration of $5 \times 10^{18} \, m^{-3}$,hole concentration of $5 \times 10^{19} \, m^{-3}$,electron mobility of $2.0 \, m^2 \, V^{-1} \, s^{-1}$,and hole mobility of $0.01 \, m^2 \, V^{-1} \, s^{-1}$? (Take charge of electron as $1.6 \times 10^{-19} \, C$)