Car battery + terminal allways biger than - terminal! Why?

2 Answers  

---

if a 3 point starter is not available, how can a dc motor be started?

3 Answers   Accenture, BIT, Techno Solutions,

---

whose the first invented AC voltage or DCvoltage

4 Answers  

---

Why in india freq. is 50HZ & in U.S.A. it is 60HZ?

2 Answers   MacLellan,

---

CONSIDER A 415V/200V STEP DOWN TRANSFORMER.CAN WE USE USE IT AS STEP UP TRANSFORMER BY GIVING 200V IN SECONDARY AND TAKING OUTPUT FROM PRIMARY?

3 Answers  

---

Why a tesa lamp is glow between two phase?

0 Answers  

---

In 110V DC supply,if a closed circuit gets open, How can we identify the voltage which is measured after the resistor(4KOhm) which is open with negative.it shows 55V +ve when measured, also the actual positive source is 55V +ve .Because there is no voltage drop in open circuit. How can we identify whether this is the voltage which is series with the resistor or the DC source direct +ve.

1 Answers   GE,

---

How loading get increased in generator not the speed, while we increasing steam to turbine.

2 Answers  

---

how the earhing is done on ship and airplane.

2 Answers  

---

can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?

2 Answers   Maersk,

---

what is the difference between megger and earth resister ??

0 Answers   HMPL,

---

PRV (Pressure relief valve) Trip with oil splash outside power transformers

1 Answers   Khan,

---