Answer / k.prakashchandra

It starts with Faraday's law of induction i.e.V = N x d.
flux /dt.If the flux is purely sinusoidal,the relationship
is given by the universal EMF law E peak=2 pi x f x peak
flux x N.If you divide this by root 2 ,you get Erms nearly
equal to 4.44 x f x flux x N.

Answer / aj

sqrt(2)*pi see http://info.ee.surrey.ac.uk/Workshop/advice/coils/Faraday/index.html for derrivation

Answer / shaikh_mohammedfarhan

U Can't change in eqition

Answer / usman

this is an empirical relation. u cann`t justify this . if u want to know where it came from u should see its derivation

Difference between online and offline UPS?

11 Answers  

---

Why the transformer rating is denoted in VA rating why not in KW

7 Answers  

---

From an electrical motor & electrical generator, which has more efficiency & why?

1 Answers   Sahi,

---

What are various modes for Mechanical interlocking of breakers (for both MCCBs & ACBs)

1 Answers  

---

I want to know what is the short circuit level when 8 NOS 2000 kVA, 415v, 50hZ generator connected in paraller

1 Answers  

---

---

What is actual name of Transformer oil.

6 Answers  

---

Rotor resistance starter is used to obtain= A increased starting torque B decrease starting current C decrease starting loss D increase efficiency

1 Answers  

---

what are ABCD curves in MCBs and how we observe that curves?

2 Answers  

---

why core is useful for a transformer ?and also in its operation ?

0 Answers  

---

For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?

0 Answers  

---

why the the phase transformer's nuetral has been grounded

2 Answers  

---

In three phase energymeter the spindle rotating backward why?

1 Answers  

---