Question

write the circuit connection required for the normal operation of the transistor

Answer 1

A transistor is made of a semiconductor material that is usually either germanium or silicon and has a minimum of three terminals for establishing an external circuit connection. A voltage applied to one terminal determines the current flowing through the other pair of terminals. The amount of voltage and current applied depends on the choice of semiconductor. Transistors also feature one or two charge carriers.

Answer 2

A transistor is a device that regulates the voltage flow that acts as a switch for the electronic signals. These transistors consists of three layers of semi conductor material. Thus, these are the basic elements in integrated circuits.

Transistors can either work as an amplifier or a switch. While working as an amplifier it takes electric current at one end and produces a much bigger current at the other end. For example in hearing aids.
In case of a switch the small electric current switches the larger current. For example in memory chips.