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SUKUMAR SAMAL

· started a discussion

· 1 Months ago

The answer is wrong (Question: 344108.0 )

E0=399.4V
again from where did you get the flux ratio f/f0 = 197

Question:

A 400 V dc shunt motor takes a current of 5 A on no-load and 68 A on full load. Armature reaction weakens field by 3%. Calculate ratio of full load speed to no load speed. Given Ra = 0.2 Î©, Rf = 200 Î©

Options:
A)

0.05

B)

0.0049

C)

0.5

D)

0.4

Solution:

Ans:(b)

  

  

  

  

Saurabh Sharma

· commented

· 1 Months ago

i agree, Eo is 399.4 and flux fi is field flux that still remains constant..
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