Permanent magnets are normally made of_____________?
Correct answer: A. alnico alloys
- A. alnico alloys
- B. aluminium
- C. cast iron
- D. wrought iron
Explanation
Alnico alloys have high retentivity and coercivity, allowing them to maintain strong magnetisation and resist demagnetisation. These properties make them suitable for permanent magnets.
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
If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
A material for good magnetic memory should have____________?
Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss
Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?
An air gap is usually inserted in magnetic circuits to____________?
Hysteresis loss least depends on____________?