Semiconductor Electronics: Materials, Devices and Simple Circuits

C, Si and Ge have same lattice structure. Why is C insulator while Si and Ge intrinsic semiconductors?

Suppose a pure Si crystal has $5 \times 10^{28}$ atoms m$^{-3}$. It is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that $n_i = 1.5 \times 10^{16}$ m$^{-3}$.

Can we take one slab of p-type semiconductor and physically join it to another n-type semiconductor to get p-n junction?

In an n-type silicon, which of the following statement is true:

Which of the statements given in Exercise 14.1 is true for p-type semiconductors.

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to $(E_g)_{C}$, $(E_g)_{Si}$ and $(E_g)_{Ge}$. Which of the following statements is true?

In an unbiased p-n junction, holes diffuse from the p-region to n-region because

When a forward bias is applied to a p-n junction, it

In half-wave rectification, what is the output frequency if the input frequency is 50 Hz. What is the output frequency of a full-wave rectifier for the same input frequency.