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Q7.10: NCERT Physics - Part 1 GRAVITATION 7.10 Solution: Choose the correct answer from among the given ones: The…
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often incorrectly assume the gravitational field points toward the geometric center of the base (axis of symmetry) due to the 'missing' half of the sphere. However, for a uniform hemispherical shell, the vector contributions from all surface elements cancel exactly at the center of curvature, resulting in zero intensity.
Choose the correct answer from among the given ones: The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the direction indicated by the arrow (see Fig 7.11) (i) a, (ii) b, (iii) c, (iv) 0.
Step-by-Step Verified Solution
**Answer:** (iv) 0
**Step-by-Step Explanation:**
The gravitational intensity at the centre of a hemispherical shell of uniform mass density is zero. This is because the gravitational forces from all parts of the shell cancel out at the centre due to symmetry.
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