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JEE Main & Advanced JEE Main Paper Phase-I (Held on 09-1-2020 Evening)

  • question_answer
    Planet A has mass M and radius R. Planet B has half the mass and half the radius of Planet A. If the escape velocities from the Planets A and B are \[{{\text{v}}_{A}}\]and\[{{\text{v}}_{B}}\], respectively, then\[\frac{{{\text{v}}_{A}}}{{{\text{v}}_{B}}}=\frac{n}{4}\]. [JEE MAIN Held on 09-01-2020 Evening]

    A) 1

    B) 4

    C) 3

    D) 2

    Correct Answer: B

    Solution :

    \[V=\sqrt{\frac{2GM}{R}}\] \[\frac{{{V}_{1}}}{{{V}_{2}}}=\sqrt{\frac{{{M}_{1}}{{R}_{2}}}{{{M}_{2}}{{R}_{1}}}}\]


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