The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator ?
Correct answer: C. armature copper loss
- A. hysteresis loss
- B. field copper loss
- C. armature copper loss
- D. eddy current loss
Explanation
At rated load, armature current is high and the armature copper loss, Iₐ²Rₐ, rises accordingly. Hysteresis and eddy-current losses are mainly core-speed and flux dependent, while field copper loss is comparatively constant.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Electrical Machines
1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrical Machines questions
Which of the following loss in a D.C. generator varies significantly with the load current ?
Torque developed by a D.C. motor depends upon_____________?
D.C. shunt motors are used for driving____________?
In a D.C. generator all of the following could be the effects of iron losses except___________?
The hysteresis loss in a D.C. machine least depends on____________?
The main disadvantage of the Ward-Leonard control method is______________?