Answer / pravesh

the difference between the electroic and ordinary regulator
is that in electronic reg. power losses are less i.e. for
as we decrese the speed the electronic reg. give the power
needed for that perticular speed but in case of ordinary rh
type reg. the power wastage is same for every speed and no
power is saved

Answer / bhanu pratap

in electronic regulator triac is employed for speed cntrl.
by varying the firing angle spreed is cntrled but in
rheostatic ctrl resistance is decreased by steps to achieve
speed cntrl

Answer / leo thomas

in electronic regulators diac or triac is used.These
devices conducts only some firing angle that means we are
utilizing only a part of the sine wave,not completely.
In rheostatic control total sine wave using ,here energy
wasting

why does same amount of current flow in the circuit inspite of any number of resistances in the circuit?

3 Answers  

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When in a large power system if the demand of power is larger than the generated power the frequency of the power system drops.(assume the rated frequency is 50Hz and now it is 49Hz) So does this mean the demand is totally supplied with a lower value of generated power in a lower frequency?

1 Answers  

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what is the difference between transformer,converter and transducer

0 Answers  

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How can we convert 11 kv to 440 volt without using transformer ?

0 Answers   Electrical,

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Give accurate definitions for these electric terms: Inductor Inductance Inductive Induction Reactance Reactive Esam Baraka ٢١ ساعة

0 Answers   HMK,

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how we can select MCB ratings according to Voltages, Curves.

2 Answers  

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ganaretors A check B check and C check details

1 Answers  

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according to ohms law ,the voltage increases then current is what happened?

4 Answers   NTPC,

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why does chattering take place in ac contactors? can it be avoided & what care does the manufacturer take to eliminate this phenomenon????

10 Answers  

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name the famous power plants present in A.P

1 Answers   Power Grid,

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we know the value of the power factor is 0.8, we know the power factor is not depends upon the load ,then why we cant design the power factor in transformer ?

1 Answers  

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How many types of fault occur in a 3-phase power system?

2 Answers  

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