Which of the following statements are true about acceleration due to gravity

Options

A. g decreases in moving away from the centre if `rgtR`
B. g decreases in moving away from the centre if `rltR`
C. g is zero at the centre of earth.
D. g decreases if earth stops rotating on its axis.

Answer

A, C

Explanation

Variation of g with distance
variation fo g with `omega:g'=g-omega^(2)Rcos^(2)lamda`
if `omega=0` then g will not change at poles where `coslamda=0`.