Asked in Premeth MDCAT 2025 LR-04 — Electromagnetism, Transition Elements 2025Moderate

If magnetic field vector is B = (i + 5j + 2k ) and area vector is (6i - 2j +2k) then flux related to this is:

Correct answer: D. 0 Wb

  • A. 10 Wb
  • B. 15 Wb
  • C. 20 Wb
  • D. 0 Wb

Explanation

Given:Magnetic field vector, B = i + 5j + 2kArea vector, A = 6i - 2j + 2kThe magnetic flux (Φ) is given by the dot product of the magnetic field vector and the area vector:Φ = B · AΦ = (i + 5j + 2k) · (6i - 2j + 2k)Now, calculate the dot product:Φ = (1 * 6) + (5 * (-2)) + (2 * 2)Φ = 6 - 10 + 4Φ = 0

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About Magnetic Flux

Magnetic flux measures the magnetic field passing through a surface, calculated for a uniform field as Φ = BA cos θ, where θ is the angle between the field and the surface normal. Questions involve area, field strength and orientation, the weber as its unit, and the distinction between flux and magnetic field.

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