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Question 30778
JEE Physics · Hard

Gravitation: Advanced — Geoid MCQ

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Advanced — GeoidHardQuestion 30778

Question

The geoid is:
  1. A
    Earth's perfectly spherical shape
  2. B
    The equipotential surface of gravity that sea level follows
    Correct
  3. C
    The surface 100 km above sea level
  4. D
    The boundary of Earth's magnetic field

Correct answer

The equipotential surface of gravity that sea level follows

Explanation

The geoid is the equipotential surface of Earth's gravitational field corresponding to mean sea level. It is bumpy (not a perfect ellipsoid) due to density variations in Earth's interior.

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