In a d.c current, the power is the product of voltage and current. This relationship does not always apply to effective(r.m.s) values in an a.c circuit. Explain the reason for this.

2 Answers  

---

What is the formula to calculate the KVAR value of a capacitor, while value of capcitor in farads is known.

1 Answers  

---

Why corona leads to production of Ozone and glow of the color VOILET?

0 Answers  

---

I am about to write exam in RRB bangalore for the post of section engineer.please provide me with previous exam questions

0 Answers   Wipro,

---

Define over current & earth fault ?how its functioning ?

1 Answers  

---

---

Name different types of circuit breakers and their voltage ratings?

11 Answers   NTPC,

---

please send me latest & previous years question papers for IOCL Technical level questions

0 Answers  

---

what is the working principle of UPS?

2 Answers  

---

1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?

0 Answers  

---

A 6-pole, 50 Hz, 3-phase synchronous motor and on 8-pole, 50 Hz, 3-phase slip-ring induction motor are mechanically coupled and operate on the same 3-phase, 50 Hz supply. If they are left open-circuited, then the frequency of the voltage produced across any two slip rings would be

2 Answers   L&T,

---

how we can know the rating of transmission line by no. of insulators disk ??????????

3 Answers   NTPC,

---

How to calculate u.p.s load parsentage plz give me formula

1 Answers  

---