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Q. What do you understand by common control?
In some switching systems, control subsystem may be an integral part of switching network itself. Such system iscalled direct control switching systems. Those systems in which control subsystem is outside switching network are called common control switching system. Stronger exchanges are generally direct control systems while crossbar and electronic exchanges are common control system. All stored program control systems are common control systems. Common control is also called register control orindirect control.
Q. Explain AC voltage controllers? Common applications for these controllers are found in fan, pump, and crane drives. Figure shows three-phase symmetrical ac voltage-controlle
Q. Explain working of TTL NAND gate? The TTL logic family uses only transistors instead of a combination of transistors and diodes. TTL has the same high and low ranges as DTL.
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Q. Balanced wye-connected loads drawing 10 kW at 0.8 power factor lagging and 15 kW at 0.9 power factor leading are connected in parallel and supplied by a 60-Hz, 300-V, three-phas
Common channel signalling Signalling systems link the variety of switching systems, transmission systems and subscriber equipments in telecommunication network to enable
Q. Define Transconductance? The control that the gate voltage has over the drain current is measured by the transconductance gfs and is similar to the transconductance gm of t
Q. Draw a neat circuit of Colpitt's oscillator using an n-p-n transistor. Give its equivalent circuit obtain expressions for (i) frequency of oscillation and(ii) minimum gain for s
Ask question #how to construct thunderstrom detector with circuit breaker.
When sizing wire, one of the most difficult tasks is to calculate the electrical load that will be present on the conductors. How do you decide what size wire to use? What two fact
how unbalanced effect in wave winding is considered to be balanced?
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