Protection Circuits in Regulators: Protection Circuits in Regulators- The series regulator using transistors has no short circuit protection. If the load terminals are shorted accidentally then, Large amount of load current will flow. The pass…
Forced Cooling in Transformer: Forced Cooling in Transformer - For transformer sizes beyond 5 MVA additional cooling would be needed which is achieved by supplementing the tank surface by a separate radiator in which oil…
Step up Chopper - Definition, Circuit Diagram and its Working Principle: In a step-down chopper the output voltage lies between zero and supply voltage. However, there are techniques by which the output of a chopper…
Voltage Control Interview Questions and Answers: 1. Why is it necessary to keep the receiving-end voltage constant within specified limits ? Ans. For satisfactory operation of equipment/machinery supplied by the electrical power network it is…
Molecular Beam Epitaxy Process: The molecular beam epitaxy (MBE) is based on evaporation. In MBE, the film is evaporated and deposited one layer at a time. In the process, no chemical reactions are considered. Instead…
Crystal Oscillators - Circuit, Working, Advantages and Disadvantages: In crystal oscillators, the usual electrical resonant circuit is replaced by a mechanically vibrating crystal. The crystal (usually quartz) has a high degree of stability in holding…
Per Unit System in Power System: Per Unit System in power system is usual to express voltage, current, voltamperes and impedance of an electrical circuit in per unit (or percentage) of base or reference values…
Working of Fusion Technology in Energy: Fusion Technology in Energy is produced in this process by the combination of two light nuclei to form a single heavier one under sustained conditions of extremely high temperatures (in…
Closed Loop Configuration of Op amp: The utility of op-amp increases considerably if it is used in a closed loop mode. The Closed Loop Configuration of Op amp mode is possible using feedback. The feedback…
Electric Motor Power Loss and Heating: An Electric Motor Power Loss and Heating occurring in its various parts such as copper losses occurring in armature and field and eddy currents in the magnetic material used…