Answer / jyoti-theboss

Induction motor works on the Faraday's law of mutual or
electro magnetic induction.Which states that if" Two coils
are inductively coupled(not electrically connected,but
closely connected without touching each other so that,flux
linkage can occur),if current flows in one circuit there is
production of emf in the neighbouring circuit.

so if power supply is given to the stator winding a
magnetic flux of constant magnitude but rotating at
synchronous speed is set up.it sweeps past the rotor
surface & cut the rotor conductors and emf induced in
them.As per Lenz's law"It opposes the very cause producing
it".So to reduce the relative speed (between rotating flux
and stationary rotor conductors) rotor starts running in
the same direction as that of the flux.

at the time of starting back emf of a motor is zero.so how can it will start to run??

1 Answers  

---

why it is so called as xlpe(cross linked poly ethyline) cable?

0 Answers  

---

what is the diffrent between ups and inverter

2 Answers   ABB,

---

what is the safty of poly phase tranformer?

0 Answers   Adani,

---

What are various modes for Mechanical interlocking of breakers (for both MCCBs & ACBs)

1 Answers  

---

ups battery design formula

0 Answers   Amara Raja,

---

types of arc quenching methodes

2 Answers  

---

WHY SPEAKER OUTPUT IN WATTS??

2 Answers  

---

WHERE CAN I GET THE PREVIOUS QUESTION PAPERS OF Govt Polytechnic in deee 2nd year papers

0 Answers  

---

why we use 110vac in overhead crains? why not 220v, 24v

3 Answers   SOFT,

---

what is mean by NTPC?,why didn't electric shock in train?

7 Answers  

---

how wecalculate breaking capcity of acb mcb mccb .explain with example

0 Answers   C&S, L&T,

---