Question

Two concentric spherical shells of masses and radii $m_{1}, \, r_{1}$ and $m_{2},r_{2}$ respectively are as shown. The gravitational field intensity at point $P$ is

• A. $\frac{G m_{1}}{r_{2}^{2} - r_{1}^{2}}$
• B. $\frac{G m_{1}}{r_{1}^{2}}$
• C. $\frac{G m_{1}}{r_{1}^{2}}+\frac{G m_{2}}{r_{2}^{2}}$
• D. $\frac{G m_{1}}{r^{2}}$

Answer 1

Answer: (D)

Since field due to the outer sphere is zero at point $P$ Hence,
intensity will be $\frac{G m_{1}}{r^{2}}$