Answer / adil naseem(pakistan)

wt i think is that 1.1 is form factor and also used in the
transformer equation i.e
E= sqrt(2) * Pi * N * f * Phi

pi=3.14
sqrt(2)=1.414
N=turns
f=50 hz or 60hz frequency
phi=flux

3.14 * 1.414 =4.44
i think due to this factor the voltages are alwas mulitple
of 11. m i corrct????
plz answer if u have better than me???
wd derivatin

Answer / osho katyal

phi= phi max sin wt
d(phi)/dt=phi max cos wt
E=-d N (phi)/dt
E=- phi max cos wt w N
E=- (phi peak/sqrt2) 2 pie f N cos wt
E=-phi peak Sqrt2 pie f N cos wt
E=-4.44 phi peak F N cos wt
- indicates back emf for primary windings,cos wt = 0 at t=o

what do you know about SERVOMOTOR

4 Answers  

---

What is MSL designation of a motor and same may be provided in details.

0 Answers   DAE,

---

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

0 Answers   BSNL,

---

In Railway,why we are used HT Line 25KV ?.why we are not used 11KV,33KV and others for This?

37 Answers   Airtel, BSNL, RRB,

---

An automatic water heater is an example of which type of control system?

0 Answers   GE,

---

where does core based current transformer is used? and what is the value of lux in a work station?

1 Answers   Space Matrix,

---

how the characterstics of control valve being done

0 Answers  

---

In view of Electrical Engg. What is the use of SCR(Silicon control rectifier)

2 Answers  

---

what is the clearance time circuit breakr?

1 Answers  

---

i need mat lab program to find out the transmission line losses,regulation and losses

0 Answers   AITM,

---

What do you mean by reach and reach the point of the relay?

0 Answers  

---

Why birds seating in HT line does not get shock? If person hangs in HT line (single hand or both hands) does he get shock?

15 Answers   SSC,

---