Electric Machine Design - Electrical Engineering Questions and Answers
This is the electrical engineering questions and answers section on "Electric Machine Design" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.
In large bulky materials, the uni-axial anisotropy can be induced by
- A. cold rolling
- B. magnetic annealing
- C. magnetic quenching
- D. any of the above
Answer: Option D
any of the above
Hysteresis loss varies with maximum flux density (B) as
Answer: Option B
Hysteresis loss varies with frequency (f) as
Answer: Option A
Which of the following can be worked with higher flux densities ?
- A. Mild steel
- B. Silicon iron
- C. Cold rolled silicon steel
- D. Hot rolled silicon steel
Answer: Option C
Cold rolled silicon steel
By adding silicon to ferromagnetic , materials
- A. electrical resistivity increases and also magnetic permeability increases
- B. electrical resistivity decreases and also magnetic permeability increases
- C. electrical resistivity decreases and magnetic permeability increases
- D. electrical resistivity increases and magnetic permeability decreases
Answer: Option C
electrical resistivity decreases and magnetic permeability increases
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