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Electrical Machines

Electrical Machines
The 3 - Φ induction motor with rotor circuit open will

  run normally.
  not run.
  make noise.
  get over heated.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Tappings of a transformer are provided

 at the neutral side end of hv side
 at the phase end of hv side
 at the middle of hv side
 at the phase end of lv side

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Electrical Machines
In a 12 pole triplex lap wound DC armature, each conductor can carry current of 100 A. The rated current of this armature is

 600 A.
 1200 A.
 2400 A.
  3600 A.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is

 31.1 Ω
 15.1 Ω
 31.9 Ω
 15.9 Ω

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be

 28 W.
 25 W.
 30 W.
 36 W.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 10KVA auto transformer, turn ratio is 0.4. Find the power transferred inductively?

 6 KVA
 0 KVA
 10 KVA
 4 KVA

ANSWER DOWNLOAD EXAMIANS APP
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