In daily life, we mostly use the decimal number system. The decimal number system has a base of ten (10). It means that there are ten digits with the help of which we can represent any number of the decimal family. The digits are from 0 to 9 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9). … Read moreBinary Number System | Conversions
The characteristics of a pulse are shown in figure 1. Base line: It is referred to the DC level and is the line at which the pulse starts and finishes. Base line shift: The shift of base line from zero volts, or the expected value, is called the base line offset. The amplitude of the pulse … Read morePulse Characteristics and Terminology
Beat Frequency Oscillator is a type of oscillator used to obtain variable frequency output in the audio frequency range. The basic working of this type of oscillator is as follows. Working Principle Figure 1 shows a block diagram of beat frequency oscillator (BFO). It uses two Radio frequency (RF) oscillators. One is fixed frequency oscillator … Read moreBeat Frequency Oscillator | Working & Limitations
Q. What are different insulators employed in substations? Answer. Some of the insulators employed in substations are: Pin insulators Post insulators Strain insulators Suspension insulators Hallow apparatus insulators Dead-end insulators Solid core insulators Q. What is creepage distance? Answer. Creepage distance is the shortest distance between two conducting points along the surface of the insulating material. Q. What … Read moreSubstation | Questions & Answers
Q. What is a System? Answer. When a number of elements or components are connected in a sequence to perform a specific function, the group of elements that all constitute a System. Q. What is Control System? Answer. In a System the output and inputs are interrelated in such a manner that the output quantity or variable … Read moreControl System | Questions & Answers
Q. What are the Differences between Solid Conductor and Stranded Conductor? Answer. Solid Conductor It consists of a single piece of metal wire. It is cheap for manufacturing. Skin effect is higher in solid conductors as at higher frequencies current flow on the surface of the conductors results in the increase in the effective resistance. The … Read moreConductors | Questions & Answers
Q. Explain why a motor of smaller rating can be selected for a short time duty? Answer. The short-time duty motor operates at a constant load for some specified periods which is then followed by a period of rest. The period of the run (or load) is so short that machine cannot attain its steady temperature … Read moreDC Motor | Questions & Answers
Q. What happen when the poles of the DC Generator increases? Answer. When the poles of the DC Generator increases the rate at which the coils cut the magnetic flux increases ( For two pole machine the rate at which the flux cut by the conductor is less compared to four pole machine), at a constant … Read moreDC Generator | Questions & Answers
Q. Why does the external characteristic of a dc shunt generator turns back as it is overload? Answer. With the increase in current supplied by the machine (i) the voltage drop across the armature winding and the contact resistance of the brushes increases (ii) the field is weakened due to an increase in the effect of … Read moreDC Machine | Questions & Answers
Q. Is modulation required in telemetry? If so why? Answer. Yes, modulation is required in telemetry. It is because the data available is in the form of current or voltage which is usually very weak for such transmission. Q. What is multiplexing in telemetry system? Answer. Transmission of two or more messages at the same time over … Read moreTelemetry System | Questions & Answers