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Question

The dimensions of permittivity $$\varepsilon_0$$are

A
$$A^2T^2M^{-1}L^{-3}$$
B
$$A^2T^4M^{-1}L^{-3}$$
C
$$A^{-2}T^{-4}ML^3$$
D
$$A^2T^{-4}M^{-1}L^{-3}$$
Solution
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Correct option is B. $$A^2T^4M^{-1}L^{-3}$$
The electrostatic force is given as:
$$F=\dfrac{1}{4 \pi \varepsilon_0}\dfrac{q_1q_2}{r^2}$$

$$\Rightarrow \varepsilon_0=\dfrac{|q_1||q_2|}{[F][r^2]}$$

$$=\dfrac{[A^2T^2]}{[MLT^{-2}][L^2]}$$

$$=[A^2T^4M^{-1}L^{-3}]$$

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