Magnetic Flux
- Magnetic flux is defined as the product of the average magnetic field times the perpendicular area it penetrates.
- In case of magnetic flux orientation of the area vector is considered.
- Area vector is considered as the amount of lines crossing an area also varies with the orientation of the area.
- It is a scalar quantity.
- Magnetic flux is denoted by ΦB or Φ.
- I Unit- Weber (Wb).
- Where 1Wb= 1Tesla x 1m2 (S.I. unit of B = Tesla and Area=m2)
- G.S unit-Maxwell (Mx).Relationship between Weber and Maxwell is;1Wb=108Mx
- Mathematically:
- ΦB = A
- B=magnetic field vector, A= area vector
- Area vector =In case of magnetic flux the amount of lines crossing an area varies with the orientation of the area.
- ΦB = BA cos θ
- Where θ=angle between magnetic field and area vector.
- Direction of area vector is determined by the normal to the area vector.
Case 1: When the angle between the area vector and the magnetic field (θ)= 900.
- Therefore, ΦB = 0 as cos900 =0.
Case 2: When the angle between the area vector and the magnetic field (θ)= 00.
- Therefore,ΦB = BA as cos 0=1.
