Symmetrical Components Interview Questions and Answers: 1. What do you mean by Fortescue theorem. Ans. According to Fortescue theorem, any unbalanced three-phase system of currents, voltages or other sinusoidal quantities can be resolved into three…
Phase Conversion in Transformer: Three Phase to Two Phase Conversion Transformer (Scott-T transformer or Scott Connection): Phase conversion from three to two phase is needed in special cases, such as in supplying 2-phase electric arc…
Blocking Oscillator - Definition, Operation and Types: The output of an active device may be coupled back to the input through a pulse transformer. If the relative windings polarities are properly chosen, the feedback will…
High Voltage Test Bushings: High Voltage Test Bushings Consisting of Three tests, namely Power Frequency Tests Impulse Voltage Tests Thermal Tests Power Frequency Tests: Power Factor—Voltage Test: In this test, the bushing is set up…
Interfacing 8259 with 8085: Fig. 14.72 shows Interfacing 8259 with 8085 microprocessor system. Addressing of 8259A : The 74LS138 address decoder will assert the CS input of the 8259A when an I/O base address is…
CoTree and Tree in Circuit Analysis: CoTree and Tree in Circuit Analysis - A tree is a connected subgraph of a network which consists of all the nodes of the original graph but no closed…
Sequence Impedance and Networks of Transformers: It is well known that almost all present day installations have three-phase transformers since they entail lower initial cost, have smaller space requireÂments and higher efficiency. The positive sequence…
8255 Interfacing with 8086: Fig. 14.17 shows the 8255 Interfacing with 8086 Microprocessor and Interfacing 8255 with 8085 Microprocessor in I/O mapped I/O technique. Here RD and WR signals are activated when IO/M signal is…
Statistical Digital Signal Processing Interview Questions and Answers: 1. What is an ergodic process? Ans. A stationary random process {Xn} is said to be ergodic, with probability 1, if all the statistical averages can be…
Monochrome Television Transmitter: As shown in the block diagram of Figure 17-2, a Monochrome Television Transmitter system is quite unlike any of the transmission systems studied previously. This section will deal with the fundamental, "straightforward"…
