The magnitude of the magnetic flux through area A has exactly the same value at angles:
Correct answer: A. 0° and 180°
- A. 0° and 180°
- B. 90° and 180°
- C. 180° and 270°
- D. 270° and 360°
Explanation
The magnitude of magnetic flux (Φ) through a surface is given by the formula Φ = B·A·cos(θ), where B is the magnetic field strength, A is the area, and θ is the angle between the magnetic field and the normal to the surface. For angles of 0° and 180°, cos(0°) = 1 and cos(180°) = -1, indicating that the magnitude of the flux remains the same, although the direction is opposite.In contrast, at 90°, the flux becomes zero because the angle leads to cos(90°) = 0. Similarly, at 270°, the flux is also zero due to the same cosine factor. Thus, options B, C, and D are incorrect as they do not yield the same non-zero flux values as found at 0° and 180°.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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