Basic Electronics Interview Questions and Answers: 1. What is difference between active and passive devices? Ans. In passive devices, the time average power delivered to the device over an infinite time period is always greater than or equal to zero while active devices are capable of supplying power. 2. Why is it necessary to connect an …
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Network Analysis Interview Questions and Answers: 1. What is an electric network? Ans. An electric network is an interconnection of physical electrical devices such as an energy source (or sources), an energy convertor or convertors (load or loads), and conductors that connect them. 2. What is an energy source? Ans. An energy source (or source), such as …
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Electron Emission Interview Questions and Answers: 1. What is Fermi level? Ans. The maximum energy that an electron in a metal has at the absolute zero temperature is called the Fermi level of energy and is designated by EF. 2. What is an electron emission? Ans. The liberation of electrons from the surface of a substance is …
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Electron Tubes Interview Questions and Answers: 1. What is an electron tube? Ans. An electron tube is an electronic device in which conduction of electrons takes place in an evacuated or gas-filled enclosure. 2. What are vacuum tubes? Ans. Vacuum tubes are those tubes in which gas is removed so that the residual gas pressure is very …
Semiconductor Physics Interview Questions and Answers: 1. Why copper is a good conductor? Ans. In case of copper the electrons in the conduction band are very large. An electron in the conduction band experiences almost negligible nuclear attraction. In fact, an electron in the conduction band does not belong to any particular atom, but it moves …
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PN Junction Diode Interview Questions and Answers: 1. What is a P-N junction? Ans. The contact surface between the layers of P-type and N-type semiconductor pieces placed together so as to form a P-N junction is called the P-N junction. 2. Why silicon is usually preferred over germanium for fabrication of semiconductor devices. Ans. The silicon semiconductor …
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Zener Diode Interview Questions and Answers: 1. What is a zener diode? Ans. Zener diode, also sometimes known as breakdown diode, is like an ordinary P-N junction diode except that it is properly doped so as to have a sharp breakdown voltage. It is specially designed for operation in its breakdown region. 2. Avalanche breakdown can …
Rectifiers Interview Questions and Answers: 1. What is a dc power supply? Ans. The part of the equipment that converts ac into dc is called the dc power supply. 2. What is meant by rectifier? Ans. A rectifier is a device which converts alternating current (or voltage) into unidirectional current (or voltage). 3. Enumerate the properties that …
Bipolar Junction Transistors (BJTs) Interview Questions and Answers: 1. Explain why BJT is a polar device. Ans. Since both of the charge carriers (electrons and well as holes) are involved in current flow through a BJT (may be either N-P-N or P-N-P), these devices are called the bipolar devices. 2. Why transistor is called current controlled …
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Transistor Biasing and Stabilization Interview Questions and Answers: 1. Explain the term biasing. Ans. The proper flow of zero signal collector current and the maintenance of proper collector-emitter voltage during the passage of signal is called the transistor biasing. If the transistor is not biased properly, it would work inefficiently and produce distortion in the output signal. …
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