Inductance of a coil Varies__________?
Correct answer: E. as A. to (d)
- A. directly as the cross-sectional area of magnetic core
- B. directly as square of number of turns
- C. directly as the permeability of the core
- D. inversely as the length of the iron path
- E. as A. to (d)
Explanation
For a coil, L = μN²A/l, so inductance increases with core area, permeability, and the square of turns, while decreasing with magnetic-path length. Therefore all statements from A through D are true.
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