Hello Aspirants. Welcome to Online General Knowledge section in Affairs cloud, which is important for all the competitive exams. We have created Some questions related to General Science(Physics) !!
- An atomic clock is based on transitions in …………………………….
5.None of theseAnswer – 2.Ceasium
A caesium standard or caesium atomic clock is a primary frequency standard in which electronic transitions between the two hyperfine ground states of caesium-133 atoms are used to control the output frequency. The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK.
- A convex lens always form an image which is
1.Virtual and inverted
2.Real and inverted
3.Real and erect
4.Virtual and diminished
5.None of theseAnswer – 4.Virtual and diminished
A convex mirror forms a virtual, diminished and upright image of an object.
A concave lens always form an image which is Virtual and erect
- The Propagation of sound waves in a gas involves which of the following ?
1.Isobaric compression and reflection
2.Isothermal compression and rarefaction
3.Adiabatic compression and rarefaction
4.Isochoric compression and reflection
5.None of theseAnswer – 3.Adiabatic compression and rarefaction
An adiabatic process is one that occurs without transfer of heat or matter between a thermodynamic system and its surroundings. In an adiabatic process, energy is transferred only as work
Rarefaction is the reduction of an item’s density, the opposite of compression.
- Which of the following colour light has the highest velocity through vacuum ?
4.All of these
5.None of theseAnswer – 4.All of these
All the transverse electromagnetic waves in vacuum have the same speed
- Sun’s light appear to travel as………… beams towards earth
5.None of theseAnswer – 1.Parallel
Explanation : Sun’s light appear to travel as parallel beams towards earth 1 . Sun produces electromagnetic radiations through pp chain
- Which of the following does not contain silver ?
5.Both 3 and 4Answer – 5.Both 3 and 4
The usual formulation is 60% copper, 20% nickel and 20% zinc.Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated.
- Alpha Particle is the nucleus of an atom of which of the following ?
5.None of theseAnswer – 4.Helium
Alpha particles are helium atoms
- Coating of Solid waste with impervious material is known as ………………
5.None of theseAnswer – 2.Landfill
Solid wastes produced from coating lines are disposed of in three ways: (l) incineration, (2) landfill, and (3) stockpiling.
- Ultraviolet rays can be used in water treatment as ……………….
5.None of theseAnswer – 3.Disinfectant
UV disinfects water containing bacteria and viruses and can be effective against protozoans like, Giardia lamblia cysts or Cryptosporidium oocysts.
- Natural magnet is ……………………
1.Oxides of Iron
2.Oxides of Hydrogen
3.Oxides of Carbon
4.Oxides of Magnesium
5.None of theseAnswer – 1.Oxides of Iron
Magnetite is a mineral and one of the three common naturally-occurring oxides of iron. Its chemical formula is Fe3O4, and it is a member of the spinel group.