Answer / sumit

since the induced emf in the dc motor oppose the votage
applied to the armature of a dc motor. so it is called the
back emf

Answer / vishnu gandhi

All windings have self inductance and mutual inductance. So
Lx dI/dt effect produces oppose to current which can be
termed as back emf. In case of Induction Motor the rotor
is short cicuited secondary of transformer which produces
it's own magnetic field and back emf is iduced in primary
winding which depend upon speed of rotor and
current.

Answer / dhaval busa

we take dc motor,when we apply voltage in dc motor the current is flow.the armature carrying conductor take current and cut the main field. according to faraday's law rate of change of flux,emf is induced but oppose the emf according to lenz's law.this emf called back emf

Answer / sathish

An EMF which comes backwards is called bach emf

What is the purpose of earthing Truck ? How does it work for busbar and cables?

1 Answers  

---

How to checking sld drawingas and control drawings

1 Answers  

---

How to Calculate the maximum Demand required for a connected load for a manufacturing Plant

6 Answers  

---

What is the difference between amorphous core transformer and CRGO core transformer?.

0 Answers   DAE,

---

WHAT IS THE DIFFERENCE BETWEEN GENERAL INVERTER AND SOLOR INVERTER TELL ME PLZ

0 Answers   Epcon,

---

What is the stander resistance value between the neutral and earth?

10 Answers   Crossdomain, Sepco,

---

What are the different protection systems used to protect the transformer internally and externally?

16 Answers  

---

what happen ehen synchronisation is done at below rated speed

0 Answers  

---

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

1 Answers  

---

If oil and air can withstand a high MeV when used as an insulator in a transformer, what are the values of how high for each material?

0 Answers  

---

differance b|w ground, neutral&earth

11 Answers   Bhel, SKH Metals,

---

What is the actual meaning of thermal power efficiency ?

0 Answers  

---