The unit of magnetic flux in terms of lines of force is ________.

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SSC JE Electrical 16 Nov 2022 Shift 3 Official Paper
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  1. 1 wb = 106 lines of force
  2. 1 wb = 10-8 lines of force
  3. 1 wb = 108 lines of force
  4. 1 wb = 10-6 lines of force

Answer (Detailed Solution Below)

Option 3 : 1 wb = 108 lines of force
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The correct answer is option 3):(1 wb = 108 lines of force)

Concept:

  • The magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface. It is usually denoted Φ or ΦB.
  • Magnetic flux is no. of the magnetic lines of force present per unit surface. Magnetic flux is often also called magnetic flux density. or even magnetic field line density.
  • Weber (Wb) is the SI unit of magnetic flux, which is named after Wilhelm Eduard Weber, a German physicist.
  • 1 wb = 108 lines of force
  •  Dimension: Wb = V⋅s = N⋅m⋅A−1 = kg⋅A−1⋅s−2⋅m2 = T⋅m2, where A stands for ampere, T for tesla, V for volt, and N for newton.
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