JEE Main 2022 · 29 Jun · Shift 1 · Physics Q44

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PhysicsSingle correct+4 / -1Question 44 of 90

The escape velocity of a body on a planet 'A' is 12 kms $^{-1}$ . The escape velocity of the body on another planet 'B', whose density is four times and radius is half of the planet 'A', is :

12 kms

^{-1}

24 kms

^{-1}

36 kms

^{-1}

6 kms

^{-1}

Answer and worked solution

Official answer: A

Escape speed $\propto R\sqrt\rho$ : $\frac12\cdot\sqrt4=1$ , so 12 km s $^{-1}$ .

(A)

Topics:Escape velocity

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JEE Main 2022 · 29 Jun · Shift 1, Physics question 44