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Questions  

Acceleration due to gravity at the pole of earth is g, at the equator it is gn(n>1). If R be the ratios of earth then time period of spin of earth is 

a
2πRng
b
2πRng(n−1)
c
2πRg(n−1)
d
2πRng(n+1)

detailed solution

Correct option is B

Earth's spin has no effect on acceleration due to gravity at the poles. ∴ At the equator, gn=g−ω2R

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