Answer / Navneet Kumar

Electric motors work on the principle of electromagnetic induction, where a rotating magnetic field is created by passing an alternating current through a coil, which in turn generates a rotating force (torque) on a stationary armature or rotor.

what is the use of switch disconnector fuse

1 Answers  

---

what is AB switch???

6 Answers   NTPC, Simplex,

---

54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?

1 Answers   Bajaj, TCS,

---

How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

1 Answers  

---

Why auxiliary transformers are not connected in parallel in primary stations?

1 Answers   Adweb,

---

what is magnetizing current test in power transformer

1 Answers   ABB,

---

WHY IL=IPH IN STAR AND WHY IPH=IL/1.732 IN DELTA? WHAT IS REASON BEHIND IT?

1 Answers   Siemens,

---

While performing load test on DC SERIES MOTOR, does the voltage decrease slightly. Why?

2 Answers  

---

Why armature rheostat is kept in maximum position?

1 Answers  

---

checking procedure of capacitor based motors.used in fans etc?

1 Answers   Badve,

---

What makes the difference between 50Hz supply and 60Hz supply which one is economical? What is the use of using increased frequency?

5 Answers   ABB,

---

what is called star connection and delta connection also purpose of this connections?

3 Answers   Siemens,

---