Draw a circuit diagram of a $p-n$ junction diode in forward bias.

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

Draw the circuit diagrams of $pn$ -junction in forward and reverse bias.

What type of biasing does give a semiconductor diode very high resistance ?

How $p-n-p$ and $n-p-n$ transistors are represented symbolically?

What is the difference between an $n$ -type and a $p$ -type semiconductor ?