Answer / ahamay

AC current is generated by Rotating a coil in the path of magnetic flux. Any circular motion can be expressed in trigonometric values. Form factor depends on the sine of angle and always constitute 1.11 ((Imax X 2) / 3.14)

Answer / pradeep

The rating of the generators are increased above 33kv.So the rotor size increased.This rotor does not rotating easily

Explain briefly about current , voltage and power

6 Answers   L&T,

---

why pure sine wave inverter used for desktop ?

1 Answers  

---

In star delta Schematic can we connect OLR in delta circuit

2 Answers   ABB, Lanco,

---

what is the meaning of x,m,k in the relays?

0 Answers   ITC Infotech,

---

If i switch on a transformer but with no load connected to the secondary path.Is the transformer will burn?

5 Answers  

---

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

0 Answers   Hormozgan Steel,

---

I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

0 Answers  

---

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate rotor frequency. A 50 Hz B 0 Hz C 4 Hz D 6 Hz

3 Answers  

---

whate is the meaning of balance/unbalance,in stabilizers type

0 Answers   TCS,

---

Generally we denote power in 'p',voltage in 'v'but why can't we denote current in 'c' instead of I.

4 Answers   Bhel,

---

to improve the existing power factor whether capacitors have to be added in series or parallel.and why

3 Answers  

---

What do you mean by a voltage transformer?

0 Answers  

---