# An isolated metal sphere of radius R, carrying an electric charge Q, is...

Question 1108
A
$$\frac{Q}{4 \pi E_o E_r r^2}$$
B
$$\frac{Q}{4 \pi E_o E_r(R + r)^2}$$
C
$$\frac{Q}{4 \pi E_o E_r(R - r)^2}$$
D
$$\frac{Q}{4 \pi E_o E_rR^2}$$
##### Explanation

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