Value of permeability of free space in SI units is___________________?
Correct answer: B. 4πx10-7 WbA-1m-1
- A. 4πx10-9 WbA-1m-1
- B. 4πx10-7 WbA-1m-1
- C. 4πx10-10 WbA-1m-1
- D. 4πx10-8 WbA-1m-1
Explanation
The permeability of free space is μ0 = 4π x 10^-7 Wb A^-1 m^-1, equivalently N A^-2. The powers of ten in the other choices are incorrect. The likely wrong choice is d, which differs by a factor of 10 from the correct value.
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