Answer / amritpal singh sidhu

AC is differ from DC as per given below:
1. In AC transformer can be used but in DC we can't use
transformer.
2. In AC can't be stored but DC can be.
3. In AC there is skin effect but in DC there is no skin
effect.
4. There is revolving field in 3-phase AC machines but
there is no revolving field in DC machines.
5. AC switch gears are cheap,robust,easily maintence but DC
switch gears are not.

Answer / t lakshmi narayana

If DC Voltage(=5v) is applied for a resistor 'R' Heat is
produced.
For same resistor 'R' and same amount of heat an AC voltage
applied is more.

DC = RMS Value * AC

What is meant by Load Encroachment in OHL Feeder Protection?

0 Answers  

---

Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in

0 Answers   HAL,

---

please tell me how a surge protector work on a DC 48Volt.? please describe briefly.

0 Answers  

---

why 3 phase motors are preferable over single phase motors ?

6 Answers  

---

which motors are used in electric traction?

1 Answers  

---

why the rating of transformer in only KVA not in others?

7 Answers  

---

WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION

0 Answers  

---

How does a star connection and delta connection work? How does the star connection save starting current and how does it change to delta?

3 Answers  

---

A two-terminal variable resistor is known as a

1 Answers  

---

why phase & neutral is use in tv? why earthing not use ?

2 Answers  

---

How does an oscillator differ from an amplifier?

0 Answers  

---

can we use 400w coke instead of 250w choke in 250w fittings

2 Answers  

---