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Question
What makes the difference between 50Hz supply and 60Hz 
supply which one is economical? What is the use of using 
increased frequency?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
if frequency is increases current decreases(due to inversly
proposational) current deceases area of conductor size is
decreases(directly propsational) size decreases then power
loss consuption will be reduced..
 
Is This Answer Correct ?    3 Yes 0 No
Srikanth
 
Answer
# 2
When we increase the level of frequency, level of power
losses will automatically reduce.As we are aware of
transformer emf equation, E=4.44fNAB.
f=frequency,A=area of cross-section,B=magnetic flux density
when we increase the frequency, by having E&B as
constant,area of cross-section will reduce.So,the size of
transformer can be reduced with higher frequency
 
Is This Answer Correct ?    1 Yes 0 No
Chandru
 
 
 
Answer
# 3
frequency is inversely propotional to the reactance,so if
the frequency increases,reactance decreases thereby current
gets increased.so if the resistance is constant,voltage
increases so that the windings cant be able to withstand
the increased voltage and also if the current increases
I^2R losses will increase.
 
Is This Answer Correct ?    4 Yes 6 No
C_elavarasi@yahoo.com
 
Answer
# 4
50 HZ is uswed in india and also majority in other world.
some of countries uses 60 HZ as UK . The frequency is
inversly proportional to current ,so when drops current
increases or vise versa.the change of frequency is uses in
VFD to change speed .
 
Is This Answer Correct ?    0 Yes 4 No
Anil
 
Answer
# 5
if frequency increases power losses decreases
viceversa.50hz econ0mical
 
Is This Answer Correct ?    7 Yes 15 No
Ekanadam Patlavath
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
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how to select cable size for three phase?   1
When measuring the Insulation resistance of a motor winding (winding to earth) using a megger meter, Applied voltage(1000V) was automatically reduced to 500V. and the measured insulation resistance values are also very low (in Kohm range) Can anyone give me a reason???   3
what will happen if the frequency supplied is more than the frequency of the instrument...?   3
sir please tel me how calucalte kwh if home taken load 30ams how maney kwh taken per day.and 3phase motor 5hp per hars how maney load teken and how mach kwh and forward me to electrical table for calicalte kwh and kvr and kvah   1
using in R,Y& B PHASE LTSIDE(415V)ct ratio 4000/5 WITH ENERGYMETR OF 1280 REV./KWH,240V.WHAT WILL BE MF OF METRE. HCC 1
Why the CT Secondary is rated as 5A generally?   2
There is no such thing as a Generator. All power generating devices are Alternator since both generate alternating current since this is the only way electrical power can be generated. In "generators" the alternating current is converted into DC inside the housing of the "generator" in order to give out DC Do you agree? If not please educate me. How else is DC generated if not like above?   2
which is best ac or dc   3
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