Answer / mudit

With the backing of the Westinghouse Company, Tesla's AC
system became the standard in the United States. Meanwhile,
the German company AEG started generating electricity and
became a virtual monopoly in Europe. They decided to use
50Hz instead of 60Hz to better fit their metric standards,
but they kept the voltage at 110V.

Unfortunately, 50Hz AC has greater losses and is not as
efficient as 60HZ. Due to the slower speed 50Hz electrical
generators are 20% less effective than 60Hz generators.
Electrical transmission at 50Hz is about 10-15% less
efficient. 50Hz transformers require larger windings and
50Hz electric motors are less efficient than those meant to
run at 60Hz. They are more costly to make to handle the
electrical losses and the extra heat generated at the lower
frequency.
Europe goes to 220V

Europe stayed at 110V AC until the 1950s, just after World
War II. They then switched over to 220V for better
efficiency in electrical transmission. Great Britain not
only switched to 220V, but they also changed from 60Hz to
50Hz to follow the European lead. Since many people did not
yet have electrical appliances in Europe after the war, the
change-over was not that expensive for them.
U.S. stays at 110V, 60Hz

The United States also considered converting to 220V for
home use but felt it would be too costly, due to all the
110V electrical appliances people had. A compromise was made
in the U.S. in that 220V would come into the house where it
would be split to 110V to power most appliances. Certain
household appliances such as the electric stove and electric
clothes dryer would be powered at 220V.

Answer / ravi

Its not compulsory that u have to use 50hz, but in india
the frequency they are using for domestic , industry , etc
is of 50hz. In US its 60 hz. As freq increases loss
decreases but its very costly if u r switching from 50 hz
to 60 hz.

Answer / gosu ramesh

Tesla invented ac. he uses 6ohz for that ac, because it time
compatible, means 60sec and 60hz, so it is easy ti
understand and for calculation also, more over as frequency
increases system size will reduces but too much increase in
frequency will increases losses.so a satisfactory frequency
is selected by tesla i.e 60hz.But in india we are using
50hz, to reduce the losses the power system network. for
operating with 60hz we need lot of money to compensate the
losses with the increase in frequency.

Answer / sikhanyiso

to obtain a sine we have to choose a maximum amplitude to
use, as frequency has something to do with amplitude an
avarage frequency is selected.

Answer / anil

50 hz are use because of lower impadance loss which is
increase with frequency, for this result we can use thin
capicitor

Answer / vinit92

bcoz in india all the machines are designed for operating
50hz this freq. in us their machinery r designed for
operting 60hz freq.
in ud they have to require very faster machinery for working
so they r used 60hz and also when freq. increases then the
speed of the machinery will be increases .

Answer / pavan kumar.u.c.s,jntu student

for production of sine wave a particular amplitude is
required,which in accordance with frequency produce sine
wave.this amplitude matches the frequency at 50hz.

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