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प्रश्न
A planet has same density and same acceleration due to gravity as of earth and universal gravitational constant G is twice of earth. The ratio of their radius:
पर्याय
1 : 4
1 : 5
1 : 2
3 : 2
MCQ
उत्तर
1 : 2
Explanation:
`"g"_"e"/"g"_"P" = ("G"_"e" 4/3π"R"_"e"^3ρ"R"_"p"^2)/("G"_"P"4/3π"R"_"P"^3ρ"R"_"e"^2)`
`"R"_"P"/"R"_"e" = 1/2`
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