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State the value of (i) proportionality i...

State the value of (i) proportionality in Coulomb's law (ii) the permittivity of free space.

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(i) The value of the constant k in coulomb.s law `k = 9xx10^12Nm^2C^-2`
(ii) The permittivity of free space
`epsilon_0 = 1/(4pik) = 8.85 xx 10^-12C^2N^-1m^-2`
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