Magnetic Circuits MCQ Questions Answers-Practice Set
Magnetic circuits are essential components in many electrical and electronic systems, enabling the transfer of magnetic energy and facilitating the operation of devices like transformers, inductors, and magnetic sensors. Understanding the fundamentals of magnetic circuits is crucial for engineers and students in the field of electrical engineering. To aid in the comprehension of this topic, this article presents a set of multiple-choice questions (MCQs) along with their answers, designed to test and enhance your knowledge of magnetic circuits.
1) The B-H curve for __________ will be a straight line passing through the origin
a) air
b) soft iron
c) hardened steel
d) silicon steel
2) For 1 m3 of material, the hysteresis loss will be minimum for
a) soft iron
b) steel
c) cobalt steel
d) silicon steel
3) The SI unit reluctance is
a) AT/Wb
b) AT/m
c) AT
d) N/Wb
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4) The value of leakage co-efficient for electrical machines is usually about…….
a) 0.5 to 1
b) 4 to 10
c) above 10
d) 1.15 to 1.25
5) The unit of relative permeability is
a) AT/m
b) N/Wb
c) AT/m2
d) a number
6) At high frequencies the material used for transformer cores is
a) silicon iron
b) soft iron
c) ferrite
d) none of the above
7) Out of the following materials, the area of hysteresis loop will be least for………
a) wrought iron
b) hard steel
c) silicon steel
d) soft steel
8) The magnetic material used for ……… should have a large hysteresis loop.
a) transformers
b) d.c generators
c) a.c motors
d) permanent magnets
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9) The B-H curve of a ferromagnetic material is
a) linear
b) non-linear
c) circle
d) none of the above
10) The material used for the core of a good relay should have ……… hysteresis loop.
a) large
b) very large
c) narrow
d) none of the above