A laminated iron core has reduced eddy-current losses because____________?
Correct answer: B. the laminations are insulated from each other
- A. more wire can be used with less D.C. resistance in coil
- B. the laminations are insulated from each other
- C. the magnetic flux is concentrated in the air gap of the core
- D. the laminations are stacked vertfcally
Explanation
Insulating the thin laminations prevents large circulating eddy-current paths between adjacent sheets, thereby reducing eddy-current loss. Stacking alone would not provide this electrical isolation.
Last updated
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.
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.
Related questions
The typical value of SCR for modern alternator is____________?
If the efficiency of a machine is to be high, what should be low __________?
Which of the following does not change in a transformer ?
In a transformer the energy is conveyed from primary to secondary_________?
A transformer core is laminated to__________?