In S.I units, the value of "μ₀" is:
Correct answer: D. 4π x 10⁻⁷ Wb A⁻¹ m⁻¹
- A. 4π x 10⁷ Wb A⁻¹ m⁻¹
- B. 4π x 10⁷ Wb A m⁻¹
- C. 4π x 10⁻⁷ Wb A⁻¹ m
- D. 4π x 10⁻⁷ Wb A⁻¹ m⁻¹
Explanation
μ₀ is the permeability of free space, a fundamental constant in electromagnetism. By definition, its value in SI units is exactly 4π x 10⁻⁷ Wb.A⁻¹. m⁻¹ (or T·m/A).
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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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