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Physics · GRAVITATION
हिन्दीMatch List-I with List-II: List-I (Physical Quantity) List-II (Expression / Value) A Escape speed from Earth I \( \approx 85\text{ minutes} \) B Escape speed from Moon II \( \approx 11.2\text{ km s}^{-1} \) C Time period of near-Earth orbit (\( h \ll R_E \)) III \( \approx 2.3\text{ km s}^{-1} \) D Orbital speed of near-Earth satellite IV \( \sqrt{g R_E} \) Choose the correct answer from the options given below:
Match List-I with List-II:
| List-I (Physical Quantity) | List-II (Expression / Value) | ||
|---|---|---|---|
| A | Escape speed from Earth | I | \( \approx 85\text{ minutes} \) |
| B | Escape speed from Moon | II | \( \approx 11.2\text{ km s}^{-1} \) |
| C | Time period of near-Earth orbit (\( h \ll R_E \)) | III | \( \approx 2.3\text{ km s}^{-1} \) |
| D | Orbital speed of near-Earth satellite | IV | \( \sqrt{g R_E} \) |
Choose the correct answer from the options given below:
Correct answer · Option 4
A-(II), B-(III), C-(I), D-(IV)
Explanation
Escape speed from Earth is \( 11.2\text{ km/s} \) (A-II). Escape speed from Moon is \( 2.3\text{ km/s} \) (B-III). Period near Earth is \( \approx 85\text{ min} \) (C-I). Orbital speed near Earth is \( \sqrt{g R_E} \) (D-IV).
