Answer / amanmahajan2837

A)1kVA,25Hz
Transformer size is inversely propotional to frequency as we have to increase no of turns for low frequency to produce same impedance

Answer / k.prakashchandra

Back emf is equal to 4.44 flux x frequency x turns . For the given voltage if the frequency is reduced , flux should be increased and hence the larger core or more number of turns

Answer / amanmahajan2837

A) 1kVA , 25 Hz as size is inversely propotional to frequency because we have to increase turns to produce same impedance for low frequency

Answer / vipin singhal

1kva 100hz

Answer / mitesh22

D) 1KVA,100Hz

oltc of a transformer, how it works? and what are the equipment consist of describe briefly?

0 Answers  

Why electrical power generation and transmission done in 3 phase system not more than 3 phase ?

0 Answers  

what is the exact direction of current? as we know current travels from higher potential to lower potential,so if we take battery +ve to -ve implies current direction is from positive terminal to negative terminal.,whereas electrons flow from negative to positive as they are attracted by positive ions.current will be the plow of charge but not flow of positive ions.please clarify my doubt friends.

2 Answers  

What are the main problems in distribution? I have to do an assignment so which problem should I choose? Like power factor problem etc.

4 Answers  

what is the use of Reactive power in power system?

3 Answers  

what is the prinsiple of dc motor and construction and working ,application of dc motor.

0 Answers  

Why we are using Isolation Power Transformer inplace of commercial power transformer? What's the difference between them?

0 Answers   UPCL,

for a 33/11kv transformer, after step down what happens to the balance 22kv.

2 Answers  

What is reason to get a power factor nearly zero in resistive loads

2 Answers  

what is meant by PU value ? anyone can you explain briefly to me ?

3 Answers  

i am using auto transformer for starting of induction motor to provide reduse voltages...but the principle of a tansformer according to definition"which transform energy to on circuit to another circuit with constant power and constant frequency". so if i am using reduse voltage then current obsely hige because power is same.but we use auto transfarmer for starting of induction motor to give low current.but here according to definition we are giving hige current.

0 Answers  

what is the practical definition for voltage

3 Answers