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CBSE Class 12-science Answered

What is magnitude and unit of permittivity of free space?
Asked by Topperlearning User | 17 Apr, 2015, 10:00: AM
answered-by-expert Expert Answer

Permittivity of free space is given by

begin mathsize 11px style straight epsilon subscript 0 space equals space 9 space cross times space 10 space to the power of negative 12 end exponent space straight C squared space straight N to the power of negative 1 end exponent space straight m squared end style

SI unit of permittivity of free space:
From coulomb's law,

begin mathsize 11px style straight epsilon subscript 0 space equals space fraction numerator straight q subscript 1 straight q subscript 2 over denominator straight F space cross times space 4 πr squared end fraction space equals space straight C squared straight N to the power of negative 1 end exponent straight m squared end style
Answered by | 17 Apr, 2015, 12:00: PM

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