Answer / chaitanya

when the core of the solenoid is cojusted or less than the
required area.as the windings are placed very closer the local
currents will diffuse with each other (or collide) which will
cause in production of the humming sound...this i had
personally experienced when i am preparing a solenoid core
transformer for my project....

Answer / ashok bhatnagar

The core vibrates at the frequency of supply and therefore
produces sound due to phenomenon of magnetostriction

What happens if a three phase induction motor is suddenly single-phased while running? Which type of winding connection will be affected?

22 Answers   B4S Solutions, DRDO, FACT, SL Electricals,

---

Which fault is caused by lightening and thuderstorm a. Line to line fault b. Single line to ground fault c. Double line to ground fault

1 Answers  

---

What is the difference between circuit breaker and isolator

0 Answers  

---

where can the transformer having vector group Yny0 be used??

0 Answers   GK Power, NEA, Petrotech,

---

what is under coal gassification?

0 Answers  

---

what happen if one of 3-phase line has a much higher load when we are using delta to star transformer? how we can over-come from that?

2 Answers   Getco,

---

why occ characteristics of generator is also called as magnatization characteristics ?

0 Answers  

---

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

3 Answers  

---

In parallel operation time both NGR’s close or not close if both close what will happen

0 Answers  

---

Why transformer use to generator neutral earthing purpose ?

1 Answers  

---

Why insulation layer of a High Voltage cable is more than a current carrying cable?

3 Answers  

---

What is meant by a stray loss of a induction motor??? What is the equation to find it

0 Answers  

---