alleryStart learning →Reluctance of magnetic circuit (analogous to electrical resistance):
Aℛ = l/(μA) — length / (permeability × area)
Bμ only
CJust length
DRandom
Answer & Solution
Correct answer: A. ℛ = l/(μA) — length / (permeability × area)
**Magnetic Ohm's law:** Φ = MMF/ℛ where MMF = NI (amp-turns), ℛ = l/(μA) (reluctance).
Higher μ (e.g., iron) → lower reluctance → more flux for same MMF.
Magnetic circuits analogous to electrical: MMF↔V, Φ↔I, ℛ↔R.
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