A newly discovered planet has a mass that is 4 times the mass of the Earth

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

12. A newly discovered planet has a mass that is 4 times the mass of the Earth. The radius of the Earth is ReR_{\mathrm{e}}. The gravitational field strength at the surface of the new planet is equal to that at the surface of the Earth if the radius of the new planet is equal to (A) 1/2Re 1 / 2 R_{\text {e }} (B) 2Re 2 R_{\text {e }} (C) Re‾\overline{R_{e}} (D) Re2R_{\mathrm{e}}{ }^{2}

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