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(B) For a point outside a spherically symmetric charge distribution,the entire charge can be considered to be concentrated at its center. Given: Total

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$300$

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(B) For a point outside a spherically symmetric charge distribution,the entire charge can be considered to be concentrated at its center. Given: Total charge $q = 5 \ nC = 5 	imes 10^{-9} \ C$. Distance $r = 15 \ cm = 0.15 \ m = 15 	imes 10^{-2} \ m$. The electric potential $V$ at a distance $r$ from a point charge $q$ is given by: $V = \frac{1}{4 \pi \epsilon_0} \frac{q}{r} = \frac{k q}{r}$ Substituting the values: $V = \frac{9 	imes 10^9 	imes 5 	imes 10^{-9}}{15 	imes 10^{-2}}$ $V = \frac{45}{0.15} = \frac{4500}{15} = 300 \ V$ Therefore,the electric potential at point $P$ is $300 \ V$.

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