Which surface has greater magnetic flux in same magnetic field, each has an area 1 m2.
Correct answer: D. Flux is independent of shape
- A. Circular
- B. Rectangular
- C. Square
- D. Flux is independent of shape
Explanation
The magnetic flux through a surface depends on the magnetic field strength and the angle between the magnetic field lines and the surface. The shape of the surface does not directly affect the magnetic flux. The magnetic flux through a surface is given by the formula: Φ = BAcosθ In this case, both surfaces have the same area (1m²). Assuming the magnetic field strength and the angle θ are the same for both surfaces, the magnetic flux will be the same regardless of the shape of the surface. Therefore, the magnetic flux is independent of the shape of the surface.
This question appeared on the UHS MDCAT 2022 paper, which you can sit online with every answer explained.
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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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