The magnetic reluctance of a material______________?
Correct answer: A. decreases with increasing cross sectional area of material
- A. decreases with increasing cross sectional area of material
- B. increases with increasing cross-sec-tional area of material
- C. does not vary with increasing cross-sectional area of material
- D. any of the above
Explanation
Magnetic reluctance is given by ℜ = l/(μA), so increasing the cross-sectional area provides an easier path for flux and decreases reluctance.
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