First slide

Electrostatic force

Question

Dielectric constant of pure water is 81. Its permittivity will be

Easy

A

$7 .12 \times 10^{- 10} MKS$ units
B

$8 .86 \times 10^{- 12} MKS$ units
C

$1 .02 \times 10^{13} MKS$ units
D

Cannot be calculated

Solution

$ε = {Kε}_{0} = 81 \times 8 .854 \times 10^{- 12} = 7 .17 \times 10^{- 10} MKS units$

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