NEET UG 2018 · Physics · Question 39
NEET 2018 Physics, question 39
Question 39 of the NEET 2018 paper (code AA) is a Physics question from Gravitation. Its idea, Kepler's Laws, was asked 3 times, in 2018, 2025 and 2026, across NEET 2017–2026. The CBSE official answer key gives option 2.
Updated 2026-10-08
Q39 · Physics
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are , and , respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
The figure, described in words
Ellipse with major axis AC; Sun S on AC near A; B on the orbit directly above S (SB ⊥ AC).
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Official answer: option 2 · CBSE official answer key
Same idea
Kepler's Laws, in other papers
NEET asked this idea 3 times, in 2018, 2025 and 2026. The other 2 questions below.
- 2026 Q14In a solar system, the time-period of revolution of a planet tracing a circular orbit of radius R is proportional to :One-line MCQ · Easy
- 2025 Q31The radius of Martian orbit around the Sun is about 4 times the radius of the orbit of Mercury. The Martian year is 687 Earth days. Then…Numerical · Easy
The chapter
Gravitation in ten years of NEET
19 questions from 2017–2026, asked in 10 of 10 papers, about 1.8 a paper. Gravitation alone had 19.