A level Semiconductor Electronics Quizzes

Revising A level Semiconductor Electronics with Quizzes: doping, pn junction, diodes, transistors, etc.

( A level Semiconductor Electronics quizzes for GCE A Level candidates )

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In this quiz, our main aim is to go through the topic of Semiconductors. Semiconductors are like a mother to electronics. Basically, every electronic appliance has something to do with semiconductors. Here, we will look at doping, pn junction, diodes, transistors, etc. Below are some quizzes to assist in the study of electronics. Before we go further, let's know what a semiconductor is: 

A semiconductor material has an electrical conductivity value falling between that of a conductor, and an insulator. Semiconductor devices can display a range of useful properties like passing current easily in one direction only, showing variable resistance, and sensitivity to light or heat. Devices made from semiconductors can be used for amplification, switching, and energy conversion, since the electrical properties of a semiconductor material can be altered by doping, application of electrical fields, or light. Its resistivity falls as its temperature rises, contrary to the behavior of metals.

 Its conducting properties may be altered in useful ways by introducing impurities into the crystal structure, a process called doping. When two differently-doped regions (P type and N type) exist in the same crystal, a semiconductor junction (pn junction) is created. The behavior of charge carriers, which basically include electrons and holes, and at this junction is the basis of diodes, transistors, and all modern electronics. Some examples of semiconductors are silicon, germanium, gallium arsenide, and elements near the metalloid staircase on the periodic table.

 The semiconductor materials above are single crystals. Each atom has four electrons in its outer orbit and shares these electrons with its four neighbors. Each shared electron pair constitutes a covalent bond. The force of attraction between the electrons and both nuclei holds the two atoms together. For isolated atoms (e.g., in gas rather than a crystal), the electrons can have only discrete energy levels. However, when a large number of atoms are brought together to form a crystal, the interaction between the atoms causes the discrete energy levels to spread out into energy bands.

In the exams, you are expected to know the fundamentals of semiconductor electronics ( doping, diodes, the formation of the pn junction, transistors, energy bands, etc).  For more exciting physics quizzes, click here.

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