Question

Two concentric shells of masses $M_1$ and $M_2$ are having radii $r_1$ and $r_2.$ Which of the following is the correct expression for the gravitational field at a distance $r.$

• A. $I=\frac{G\left(M_1+M_2\right)}{r^2},$ for $r<r_1$
• B. $I=\frac{G\left(M_1+M_2\right)}{r^2},$ for $r<r_2$
• C. $I=\frac{G{M}_2}{r^2},$ for $r_1<r<r_2$
• D. $I=\frac{G{M}_1}{r^2},$ for $r_1<r<r_2$

Answer 1

Answer: (D)

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