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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