Answer / www.pooneetkashyap.blogspot.co

from emf equation of X'mer
E=4.44fNAB (http://en.wikipedia.org/wiki/Transformer)

where E=voltage
f=frequency
A=Area
N=number of turns
B=magnetic flux density
in general we can say
A=E/(4.44fNB)
for constant value of E,N,B
if we increase F,then Area of core will decreases means size
of transformer will reduce.

Answer / satish kumar(satty)

EMF of a transformer increases with frequency. As a result the transformer can be physically more compact because a given core is able to transfer more power without reaching saturation and fewer turns are required to achieve the same impedance.

Answer / jaipal rathod

from transeformer eqn size of the transeformer is inversely proportional to the supply freqency...

e=4.44 f BA N

flux=B*A

SO,A=1/F
When freq increase,size or area of the t/f is decreased

Answer / chandan kumar

E=4.44bafn V
so if we increase the supply frequency the induced emf
increases
and the active power of transformer is given by P=VI,
SO POWER DEVELOPED IS INCREASES of the same t/f
if we increase the frequency
therefor the size is decreases

Answer / sandip

IN TRANSFORMER FREQUENCY NEVER CHANGE.

Differentiate AC and Dc resistance

0 Answers  

What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)

0 Answers  

what is the transformer rush current?

0 Answers  

tell me exact relation b/n voltage and current and which one is depend other

7 Answers   HAL,

What kind of preventive maintenance are there for AC induction motor?

1 Answers   Gulf,

WHAT HAPPEN WHEN A DROP OF WATER MIXED UP WITH TRANSFORMER OIL ?

4 Answers  

What is the Current equation in series RLC circuits.

0 Answers   ABB, Bhel,

MCB is used for high rating &MCB is used for lower rating.What is technical difference between ACB & MCB?

7 Answers  

Hello, I am just preparing my self for a university interview and struck on the 11kv ring main unit system network. I just know that ring main unit has total three breakers, fuses and use to supply a power to any load/ building without any interrupt. But i am not be able to visualize the connections, either Ring main unit getting power from two different power sources? or there is always one feeder in complete ring circuit??? I would be highly thanks full of you help me.

1 Answers  

What is the pro & con of having 11kv & 33kv incoming, and what is the adv & disadv. of converting from 11kv to 33kv.

0 Answers  

The moisture in air will condense at

0 Answers   Caterpillar,

Refernce currents are to be generated using refernce cueernts how can this be done??

0 Answers