[amp_mcq option1=”TRUE” option2=”nan” option3=”nan” option4=”nan” correct=”option1″]
The correct answer is False.
A bipolar transistor is an electronic device that can amplify or switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor’s terminals changes the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.
Bipolar transistors are composed of three semiconductor regions: the emitter, base, and collector. The emitter and collector are heavily doped with impurities, while the base is lightly doped. The emitter and collector are connected to the external circuit, while the base is connected to a voltage source. When a voltage is applied to the base, it creates a current that flows through the base-emitter junction. This current causes a much larger current to flow through the collector-emitter junction. This is how a bipolar transistor amplifies a signal.
Bipolar transistors are not symmetrical devices. The emitter and collector regions are not interchangeable. The emitter region is heavily doped with impurities, while the collector region is lightly doped. This difference in doping concentration causes the emitter region to have a lower resistance than the collector region. As a result, the emitter-base junction has a lower forward voltage drop than the collector-base junction. This difference in voltage drop is what causes the transistor to amplify a signal.
In conclusion, the correct answer to the question “Bipolar transistor is a symmetrical device” is False.