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Electric displacement density D at any point on spherical surface of radius R with a charge Q at the centre ina medium with dielectric constant $$\epsilon$$ is:
$$\frac{Q}{(4 \pi \epsilon R^{2})}$$
$$\frac{Q}{(4 \pi R^{2})}$$
$$\frac{Q}{(4 \pi \epsilon R)^{2}}$$
$$\frac{Q}{(4 \pi R)^{2}}$$
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