Question: 400-V dc shunt motor takes a current of 5.6 A on no-load and 68.3 A on full-load. Armature reaction weakens the field by 3%. What is the ratio of full-load speed to no-load speed? Given: Ra = 0.18 ?, brush voltage drop= 2 V, Rf = 200 ?.
Options
A : 1.2
B : 0.8
C : 1.4
D : 1
Click to view Correct Answer
Dc Machines Speed Control Using Field Control Shunt Motor more questions
Calculate the r.m.s value of thyristor current in 3-? Full....
If the radius of a Chloride ion is 0.154 nm,....
Determine the density, specific gravity, and mass of the air....
What is the ratio of Hydrogen to the Pentane in....
The power of a wave having a magnetic field intensity....
What is the maximum value of ? in ?Ag0fy/?m0 for....
Find the magnetic field intensity at the centre O of....
What is the partial safety factor for combination of DL+LL....
Molar ratio of H2 consumed to Hexane reacted in the....
What is the height difference of the water (density =....
Dc Machines Applications Dc Machines more Online Exam Quiz
Dc Machines Operating Characteristics Dc Shunt Motor 1
Dc Machines Parallel Operation Dc Generator
Dc Machines Starting Dc Motors 1