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Electrical Machine Design - Interview Questions and Answers

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11. The change in flux linkages can be caused in which ofthe following ways ?
A. The flux is constant with respect to time and is stationary and the coil moves through it
B. The coil is stationary with respect to flux and the flux varies in magnitude with respect to time
C. Both the changes mentioned above occure together, i.e., the coil moves through a time varying field
D. All ofthe above
Explanation:
12. Materials exhibiting zero value of resistivity are known as ______ .
A. conductors
B. semiconductors
C. insulators
D. superconductors
Explanation:
13. Electrical machines having power outputs ranging from a few kW upto approximately 250 kW may be classified as
A. small size machines
B. medium size machines
C. large size machines
D. any ofthe above
Explanation:
14. Electrical machines having a power output upto about 750 W may be called_______machines.
A. small size
B. medium size
C. large size
D. any of the above
Explanation:
15. In ______ machines, the size of the shaft is decided by the critical speed which depends on the deflection of the shaft.
A. small
B. medium
C. large
D. any of the above.
Explanation:
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