Question

If dielectric constant of water is $81$, then its permittivity is

• A. $7.2 \times 10^{10} \frac{ C ^{2}}{ N - m ^{2}}$
• B. $8.86 \times 10^{-9} \frac{ C ^{2}}{ N - m ^{2}}$
• C. $1.02 \times 10^{-12} \frac{ C ^{2}}{ N - m ^{2}}$
• D. None of these

Answer 1

Answer: (A)

Permittivity of water $\varepsilon=\varepsilon_{0} K$
$=8.85 \times 10^{-12} \times 81$
$=7.2 \times 10^{-10}\, C^{2} / N- m ^{2}$