Interested to Buy Any Domain ? << Click Here >> for more details...
The transformer which is smallest in size is and how to
calculate that? The options are
100 KVA, 50 Hz
100 KVa, 100 Hz
100 KVA, 25 Hz
50KVA, 25 HZ
- 4 Answers
- 15166 Views
- Ranbaxy, Zee Laboratories, I also Faced
- E-Mail Answers
Answer Posted / wareagle
The transformer equation
E = 4.44(f)(B)(N)(a) where E is the voltage in the winding
either primary or secondary, f is the frequency, B is the
flux density in the core, N are the number of turns on the
winding, and a is the cross area of the core. At higher
frequencies the number of winding turns N is reduced. This
formula follows from the Faraday formula, E = N dθ/dt and θ
= B(a).
This formula is why switching power supplies use a much
higher frequency (thousands of hertz) than 60 hertz, they
use smaller transformers that don't need as much wire as
transformers operating at 60 hertz. See Wikipedia for the
transformer website:
http://en.wikipedia.org/wiki/Transformer
Source(s):
Wikipedia for the transformer equation
100 kva 100 hz
| Is This Answer Correct ? | 9 Yes | 1 No |
Post New Answer View All Answers
What is power in wattage of 8.5 TR AC
In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above
Why water bubbles when D.C. Current is passed through it? Why not when A.C. Current is passed?
can anyone send me some sample question regarding power grid corp
why the starting voltage drop in a cable needs to be limited?what is percentage of the voltage drop allowed during starting?
what is meant by power and distribution transformer ?
what is a power factor?
what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?
how to compute kvar in substation feeder to improve power factor and sending voltage
In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.
In a large office how do we calculate required number of light fittings, assuming fittings are 4x18W or 2x36W fluorescent fitting ?
All the socket in a room become very hot, the Wall was also became very hot and the earth conductor also became live, what in your view might be the possible causes?
What is purpose of reactor?.What is different between line and bus reactor?
We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.
Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?
