why onlyseries motors are used as universal motors? why not shunt?

4 Answers   TCS,

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What is difference between slip rings and carbon burushes?

2 Answers   Hyundai, IVRCL,

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what is per unit impedance?

3 Answers  

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Why Powers are named in MW?

1 Answers  

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how to detect the presence of underground cable(while digging road)etc. -give the name of instrument

7 Answers   NTPC,

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What is instrumental error?

0 Answers  

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what is the difference between phase and neutral?

3 Answers   IAF, Indian Airlines,

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why the stator is not laminated in DC machines?

4 Answers  

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Describe Non I.S. Earth System and why is it used?

0 Answers   KPJV,

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A generating system will have a total capacity of 300 MW. Find the probable forced outage when the capacity is supplied by two 150 MW units. The operating probability of all units is P=0.98 and forced outage probability rate Q =0.02 .

0 Answers   BUET, VECL,

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At no load the PF of an alternator -Zero -Zero Lagging -Zero leading -None of the above

2 Answers  

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iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

1 Answers  

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