The rate of recombination or generation of charge carriers in a semiconductor is governed by the law$(s)$ of:

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

Explain the concept of the hole in the semiconductor.

When a small amount of impurity atoms are added to a semiconductor,then generally its resistivity:

$A$ transistor is a/an

Indium impurity is added to a sample of $Si$ to prepare a $p$-type semiconductor. In this semiconductor,one atom of indium is added per $5 \times 10^7$ atoms of $Si$. The atomic density of the $Si$ sample is $5 \times 10^{28} \text{ atoms/m}^3$. How many acceptor atoms will be present in a $1 \text{ cm}^3$ cube of silicon?