CDS (II) 2019 · General Knowledge
A full General Knowledge paper in the UPSC CDS pattern: 120 questions in 2 hours, with a third of the question's marks deducted for every wrong answer. Physics, Chemistry, Biology, defence and security, History, Geography, Polity, Economy and current events.
120questions
100marks
2 hoursno calculator
44/60/16easy / medium / hard
Topics in this paper
General Knowledge · 120 questions
- Awards7
- Sports5
- Freedom Struggle5
- Indian Geography5
- Medieval India4
- Modern India4
- World Geography4
- Ancient India3
- Constitution3
- Gravitation2
- Current electricity2
- Optics2
- Carbon2
- Indian Rivers2
Sample question from this paper
Gravitation · medium
According to Kepler's second law, the speed of a planet in its elliptical orbit is greatest when it is
- A. nearest to the Sun
- B. farthest from the Sun
- C. at the ends of the minor axis only
- D. the same at all points
Show answer and solution
Answer: A
The line joining a planet to the Sun sweeps equal areas in equal times, so the planet must move faster when it is closer to the Sun (perihelion) and slower at aphelion. The speed is therefore not uniform, and it is greatest at the nearest point.
The line joining a planet to the Sun sweeps equal areas in equal times, so the planet must move faster when it is closer to the Sun (perihelion) and slower at aphelion. The speed is therefore not uniform, and it is greatest at the nearest point.