Define ‘dynamic resistance’ of a $p$-$n$ junction diode.

Draw the circuit diagram of a half-wave rectifier using a $p$-$n$ junction diode.

Draw a labelled circuit diagram of a full-wave rectifier using $p$-$n$ junction diodes.

An $n$-type semiconductor has excess of free electrons, while a $p$-type semiconductor has a deficiency of these. But when a $p$-$n$ junction is formed, all the electrons do not flow from the $n$-region to the $p$-region. Why?

Indicate which of the following $p$-$n$ diodes are forward biased and which are reverse biased:

The figure shows two junction diodes $D_1$ and $D_2$ along with a resistance $R$ and a DC battery $E$. Show the path of the flow of appreciable current in the circuit.

The resistance of a $p$-$n$ junction is said to be low when forward-biased and high when reverse-biased. Explain.