Physics - MOST IMPORTANT CDS Previous Year Questions
Practice real questions from previous year exams of CDS.
📘 Light and Optics📚 Images formed by Concave Lens
Q1
The position, relative size and nature of the image formed by a concave lens for an object placed at infinity are respectively
🎯 UPSC CDS 2014 I
📘 Light and Optics📚 Plane Mirrors
Q2
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
🎯 UPSC CDS 2014 I
📘 Work, Energy and Power📚 Transformation of Energy
Q3
When an incandescent electric bulb glows
(a) the electric energy is completely converted into light energy
(b) the electric energy is partly converted into light energy and partly into heat energy
(c) the light energy is converted into electric energy
(d) the electric energy is converted into magnetic energy
🎯 UPSC CDS 2014 I
📘 Sound📚 Types of Sound- Infrasonic, Audible, Ultrasonic
Q4
Which of the following statements is/are correct?
1. Amnion contains fluid.
2. Ultrasound scan can detect the sex of an embryo.
Select the correct answer using the code given below.
🎯 UPSC CDS 2014 I
📘 Force and Motion📚 Circular Motion and related terms (angular displacement, time period, etc.)
Q5
You are asked to jog in a circular track of radius 35 meters. Right at one complete round on the circular track, your displacement and the distance covered by you are respectively
🎯 UPSC CDS 2014 I
📘 Gravitation📚 Misc
Q6
A typical black hole is always specified by
🎯 UPSC CDS 2014 I
📘 Magnetism📚 Transformer
Q7
A mobile phone charger is
🎯 UPSC CDS 2014 I
📘 Thermal Properties of Matter📚 Thermal Conductivity
Q8
Two layers of a cloth of equal thickness provide warmer covering than a single layer of cloth with double the thickness. Why?
🎯 UPSC CDS 2014 I
📘 Force and Motion📚 Newton's Second Law of Motion
Q9
In cricket match, while catching a fast-moving ball, a fielder in the ground gradually pulls his hands backwards with the moving ball to reduce the velocity to zero. The act represents
🎯 UPSC CDS 2014 I
📘 Thermal Properties of Matter📚 Thermal Expansion in Solid
Q10
A metal screw-top on a glass bottle which appears to be stuck could be opened by using the fact that
🎯 UPSC CDS 2014 I
📘 Light and Optics📚 Lens and its types
Q11
The upper and lower portions in common type of bi-focal lenses are respectively.
🎯 UPSC CDS 2014 II
📘 Current Electricity📚 Heating Effect of Electric Current
Q12
Tungsten is used for the construction of filament in electric bulb because of its
🎯 UPSC CDS 2014 II
📘 Current Electricity📚 Heating Effect of Electric Current
Q13
Inactive Nitrogen and Argon gases are usually used in electric bulbs in order to
🎯 UPSC CDS 2014 II
📘 Natural Phenomenon📚 Dispersion of Light through a Prism
Q14
In the phenomenon of dispersion of light, the light wave of shortest wavelength is
🎯 UPSC CDS 2014 II
📘 Sound📚 Misc
Q15
An oscilloscope is an instrument which allows us to see waves produced by
🎯 UPSC CDS 2014 II
📘 Atomic and Nuclear Physics📚 Atoms- Electrons, Protons, Neutrons
Q16
The distribution of electrons into different orbits of an atom, as suggested by Bohr, is
🎯 UPSC CDS 2014 II
📘 Atomic and Nuclear Physics📚 Nuclear Fission
Q17
Carbon or Graphite rods are used in atomic reactors as moderators for sustained nuclear chain reaction through nuclear fission process. In this process
🎯 UPSC CDS 2014 II
📘 Force and Motion📚 Physical Quantities related to Motion- acceleration, displacement, etc.
Q18
The distance-time graph for an object is shown below (a flat horizontal line parallel to the time axis). Which one of the following statements holds true for this object?
🎯 UPSC CDS 2014 II
📘 Force and Motion📚 Simple Harmonic Motion- basics
Q19
For a harmonic oscillator, the graph between momentum 'p' and displacement 'q' would come out as
🎯 UPSC CDS 2014 II
📘 Force and Motion📚 Ways to Increase and Reduce Friction
Q20
Which of the following is a good lubricant?
🎯 UPSC CDS 2014 II