The unit of permeability of free space is:
Correct answer: C. A-1Wbm-1
- A. WbmA-1
- B. WbA-1m
- C. A-1Wbm-1
- D. No units
Explanation
The permeability of free space, denoted as µ₀, is a fundamental physical constant that describes how magnetic fields interact with the vacuum of space. In SI units, its value is 4π x 10-7 Wb A-1 m-1, which can also be expressed as A-1Wbm-1. This is why option C is the correct answer. The other options do not accurately reflect the units of permeability; options A and B mix up the necessary components, while option D incorrectly suggests that permeability has no units.
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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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