What is encoder, how it function?
An encoder is a device used to
change a signal (such as a bitstream) or data into a code. The code may
serve any of a number of purposes such as compressing information for
transmission or storage, encrypting or adding redundancies to the input
code, or translating from one code to another. This is usually done by
means of a programmed algorithm,especially if any part is digital, while
most analog encoding is done with analog circuitry.
What is difference between fuse and breaker?
Fuses are burned at the time of over current flows in the circuit but breakers are just open(not burn) at the time of over current flow. Fuses are used in only one time but breakers are used by multiple number of times.
What is the difference between delta-delta and delta-star transformer?
Delta-delta transformer is used at generating station or a receiving station for Change of Voltage (i,e) generally it is used where the Voltage is high & Current is low.Delta-star is a distribution kind of transformer where from secondary star neutral is taken as a return path and this configuration is used for Step down voltage phenomena.
Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?
As we know that Electrical is having two type of load, Active and Reactive .Capacitor is a reactive load which is not considering as a load,& its factor is Isin@ .Meter is design based on Current RMS value because of it meter is showing the current RMS value.
How tube light circuit is connected and how it works?
A choke is connected in one end of the tube light and a starter is in series with the circuit. When supply is provided ,the starter will interrupt the supply cycle of AC. Due to the sudden change of supply the chock will generate around 1000volts . This volt will capable of to break the electrons inside the tube to make electron flow. once the current passes through the tube the starter circuit will be out of part. now there is no change of supply causes choke voltage normalized and act as minimize the current.
Whats is MARX CIRCUIT?
It is used with generators for charging a number of capacitor in parallel and discharging them in series.It is used when voltage required for testing is higher than the available.
What are the advantages of speed control using thyristor?
Advantages :1. Fast Switching Characterstics than Mosfet, BJT, IGBT 2. Low cost 3. Higher Accurate.
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26 Aug 2013
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