Magnetic Materials » Exercise – 1
2. The critical temperature above which the ferromagnetic materials loose their magnetic property is known as :
(a) hysterisis
(b) Curie point
(c) transition temperature
(d) standard temperatureSubject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant Electronics & Communication Engineering Books
GATE 2023 Total Info ENGG DIPLOMA UGC NET Total Info IES 2023 Total Info PSUs 2022 Total Info CSIR UGC NET Total Info JAM 2023 Total Info M TECH 2023 Total Info RAILWAY 2022 Total Info
Related Posts
Magnetic Materials » Exercise - 1 1. The covers of electrical machines are made of : (a) soft magnetic materials (b) hard magnetic materials (c) super conductors (d) semiconductors 2. The critical temperature above which the ferromagnetic materials loose their magnetic property is known as : (a) hysterisis (b) Curie point (c) transition temperature (d) standard temperature 3. Permanent magnets are made of : (a) soft magnetic materials (b) hard magnetic materials (c) semi conductors (d) super conductors 4. Materials, which provide a path to the magnetic flux, are classified as : (a) insulating materials (b) semi conducting materials (c) magnetic materials (d) dielectric materials 5. Ferrites are : (a) ferromagnetic material (b) ferrimagnetic materials (c) anti ferromagnetic material (d) diamagnetic materials 6. The relative permeability of a paramagnetic substance is : (a) unity (b) slightly more than unity (c) zero (d) less than unity 7. Ferroelectric materials are characterised by : (a) Very high degree of polarisation (b) A sharp dependence of polarisation on temperature (c) Non-linear dependence of the charge Q on the applied voltage (d) All the above 8. In a ferromagnetic material the state of flux density is as follows when external magnetic field is applied to it. (a) Increased (b) Decreased (c) Remains unchanged…- Magnetic Materials » Exercise - 14. Materials, which provide a path to the magnetic flux, are classified as : (a) insulating materials (b) semi conducting materials (c) magnetic materials (d) dielectric materials
- Magnetic Materials » Exercise - 15. Ferrites are : (a) ferromagnetic material (b) ferrimagnetic materials (c) anti ferromagnetic material (d) diamagnetic materials
- Dielectric Materials » Exercise - 19. Dielectric materials are : (a) Insulating materials (b) Semiconducting materials (c) Magnetic materials (d) Ferroelectric materials
- Semiconductor Materials » Exercise - 114. What does a Hall Effect sensor sense ? (a) Temperature (b) Moisture (c) Magnetic fields (d) Pressure