Answer / s.karthik

greater voltage if applied for greater period of time will
lead to insulation failure of the windings,coz of which the
windings will get short circuited,huge amount of current
will flow and as a result the motor will burn

Answer / roysayan01

Firstly the brushes and commutator will simply burn out
because of the high current. Secondly insulation depends on
rated voltage and if double the rated voltage is applied
insulation failure will take place.

Answer / solanki

I think that if we apply the twice voltage across the dc
moter then it will take large current bcz armature current
depend upon the as
I =v-(back emf)/armature resistance
simply if we increses voltage then current will increses
also then more heating & can damage to winding of moter

Answer / venkatesh

Always Voltage will depending on insulation & current will depending on core of wire.similarly the winding wire (copper wire) also Manufacturing in same manner if voltage will rise twice then the rated voltage the insulation will burn and shorted to anther winding turns Due to this whole motor winding will burn.

what is the function of a commutator in a dc generator?

14 Answers   College School Exams Tests, NTPC, TCS,

---

what is cro

3 Answers   HCL,

---

Can the same motor be operated in both direction ?

12 Answers  

---

sir what is the minimum IR value of 11 KV alternator?

4 Answers   Kirloskar,

---

how to claculate earth strip size for 1500kVA transformer for neutral and body

4 Answers  

---

What is diversity factor in electric installations?

0 Answers  

---

What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not?

3 Answers   Areva,

---

What are the uses of stepper motor?

0 Answers  

---

What do you mean by distribution transformers?

0 Answers  

---

How LT megger works ?

0 Answers  

---

What is making & breaking current ???

0 Answers   JLL,

---

how to create new innovation what are the supporting sources in the electrical field for Electrical engineers.....?

1 Answers  

---