alleryStart learning →Magnetic flux Φ in a magnetic circuit:
AB/A
BΦ = BA (B = flux density, A = cross-sectional area)
CJust B
DBA²
Answer & Solution
Correct answer: B. Φ = BA (B = flux density, A = cross-sectional area)
Magnetic flux Φ (Wb) = B × A (for uniform B perpendicular to surface). B in Tesla = Wb/m².
**For curved or non-uniform:** Φ = ∫B·dA.
Analogous to current in electric circuit
B is like J (current density).
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