1.

Value of permeability of tree space in SI units is

A. 4?x10-9 WbA-1m-1
B. 4?x10-7 WbA-1m-1
C. 4?x10-10 WbA-1m-1
D. 4?x10-8 WbA-1m-1
Answer» C. 4?x10-10 WbA-1m-1


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