Cryogenically Cooled Amplifiers: The term solid-state is used deliberately here; it does not mean "semiconductor." In terms of the somewhat older maser parlance, it means the opposite of gaseous, i.e., ruby. The cross section of…
Semiconductor Lasers: Semiconductor Lasers was discovered in 1962 that a gallium arsenide diode, such as the one shown in Figure 12-41, is capable of producing laser action. This occurs when the diode is forward-biased, so…
Difference between Commercial Liquid Dielectrics and Pure Liquid Dielectrics: The difference between Commercial Liquid Dielectrics and Pure Liquid Dielectrics is given below Commercial Liquid Dielectrics - Commercial liquids are insulating liquids like oils which are…
Electrical Engineering viva Questions and Answers: Following are the Basic and Advanced Electrical Engineering viva Questions and Answers Acceptor atoms - Trivalent atoms that accept free electrons from pentavhalent atoms. Alpha - Ratio of collector…
Double Tuned Amplifier - Circuit Diagram and Operation: The problem of potential instability with a single tuned amplifier is overcome in a double tuned amplifier which consists of inductively coupled two tuned circuits—one (L1, C1)…
Introduction to Induction Machine | Use of Induction Motor: The Introduction to Induction Machine is an important class of electric machines which finds wide applicability as a motor in industry and in its single-phase form…
Transmission Zero: The Transmission Zero functions describe the transmission of signal from one end to other end. The Fig. 7.28 shows the transfer of signal from one network to other through a capacitor C. There…
AC Series Motor: A series motor can be run from either dc or ac (single-phase) supply provided that both stator and rotor cores are laminated to limit the iron-loss. Figure 10.43 is the cross-sectional view…
What is Sinusoidal Pulse Width Modulation?: In Sinusoidal Pulse Width Modulation the pulse-width instead of being uniform as in the waveform of Fig. 11.55 is a sinusoidal function of its angular position with respect to…
Travelling Waves Interview Questions and Answers: 1. What are the values of natural impedances for overhead lines and cables ? Ans. The value of natural impedance for an overhead line is between 400 Ω and…