Question

What is the permeability of free space?

a.

4 * 10⁻⁶

b.

4 * 10⁻⁷

c.

4 * 10⁻⁸

d.

4 * 10⁻⁹

Answer: (b).4 * 10⁻⁷

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Q. What is the permeability of free space?

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