A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of the electric field intensity, E, at a distance r (0 < r < R) inside the sphere?

\[\frac{3}{4\pi {{\varepsilon }_{0}}}\frac{Qr}{{{R}^{3}}}\]

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{Qr}{{{R}^{3}}}\]

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{Q}{{{r}^{2}}}\]

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{QR}{{{r}^{3}}}\]

A solid sphere made of insulating material has a radius R and has a to

1.	A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of the electric field intensity, E, at a distance r (0 < r < R) inside the sphere?
A.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{Qr}{{{R}^{3}}}\]
B.	\[\frac{3}{4\pi {{\varepsilon }_{0}}}\frac{Qr}{{{R}^{3}}}\]
C.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{Q}{{{r}^{2}}}\]
D.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{QR}{{{r}^{3}}}\]
Answer» B. \[\frac{3}{4\pi {{\varepsilon }_{0}}}\frac{Qr}{{{R}^{3}}}\]

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A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of the electric field intensity, E, at a distance r (0 < r < R) inside the sphere?

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