List of top Geology and Geophysics Questions on Gravitational Field of the Earth asked in GATE GG

Consider the acceleration due to gravity \( g' \) at an altitude \( h \) of 50 km above the Earth's surface. If \( R \) is the radius of the Earth, and the acceleration due to gravity measured at the surface is \( g \), the ratio of \( \frac{g'}{g} \) is ________. (Assume \( h \ll R \), \( R = 6370 \, {km} \), and round off to two decimal places.)
In a gravity survey that is being carried out in the vicinity of a large mountain, it was observed that the deflection of the plumb line from the vertical is less than what is calculated using the visible mountain mass. Which one of the inferences about the mountain is correct?
If a planet is made of uniform density material and has no topography, then which one of the following statements is correct?
Consider the acceleration due to gravity \( g' \) at an altitude \( h \) of 50 km above the Earth's surface. If \( R \) is the radius of the Earth, and the acceleration due to gravity measured at the surface is \( g \), the ratio of \( \frac{g'}{g} \) is ________. (Assume \( h \ll R \), \( R = 6370 \, {km} \), and round off to two decimal places.)