Does the direction of rotation of d.c. Shunt motor would get reversed if the armature current and field current both are reversed?

0 Answers  

---

difference between ac and dc motor

1 Answers  

---

how ELCB drip when earth and phase touch together?

2 Answers  

---

Sir, Please tell me that how I will calculate the efficiency of rectifier. Because input is ac and output is dc. Is it right to put two unlike signal together.

2 Answers  

---

what are the merits and demerits of synchronous motor over an induction motor...??

5 Answers   NTPC,

---

What will happen when we will connect lamp in between phase and earth. 

3 Answers  

---

Transformer's core is made up of which material and why so?

10 Answers   ABB, NTPC,

---

In our factory there is one no. of Series trip HT 6KV OCB. 1. Is it possible to measure CT out put current by 440V Clamp meter? The measurement is required for knowing the exact value of current in CT secondary to set up protection for transformers. 2. plase forward the single line diagram of AMF panel?

1 Answers   HAL,

---

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  

---

why in 3.5 core means 3 core for phase and .5 for neutral?

1 Answers   Sodexo,

---

how many earthing required for ups, what should be the earth voltages

9 Answers   Juniper Networks,

---

1. what is the power factor of a purely inductive load? (i) Zero (ii) Lagging (iii)Leading (iv) Unity 2. which type of transformer connection is preferred in case of power supply transformer? (i) Star/Star (ii) Delta/Delta (iii) Star/Delta (iv) Zig Zag/Star

2 Answers  

---