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 Basic GK(Inventions & Inventors) !!!
- Who proved the Electromagnetic Theory ?
5.None of theseAnswer – 3.Heinrich Hertz
Heinrich Rudolf Hertz was a German physicist who first conclusively proved the existence of electromagnetic waves theorized by James Clerk Maxwell’s electromagnetic theory of light. Hertz proved the theory by engineering instruments to transmit and receive radio pulses using experimental procedures that ruled out all other known wireless phenomena.
- Albert Einstein proposed the …………….
2.Theory of relativity
5.None of theseAnswer – 2.Theory of relativity
The theory of relativity proposed by Albert Einstein, and subsequent work of Max Planck, Hermann Minkowski and others. General relativity (GR) is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915, with contributions by many others after 1915
- Electron Theory was proposed by …………………….
5.None of theseAnswer – 2.Niels Bohr
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity.
- Who proposed the Atomic theory ?
2.James Clerk Maxwell
5.None of theseAnswer – 4.John Dalton
Democritus first suggested the existence of the atom but it took almost two millennia before the atom was
placed on a solid foothold as a fundamental chemical object by John Dalton (1766-1844). Although two centuries old, Dalton’s atomic theory remains valid in modern chemical thought.
- Charles Darwin proposed the …………………..
1.Law of Motion & Gravitation
2.Theory of Evolution
4.Laws of Electrical Resistance
5.None of theseAnswer – 2.Theory of Evolution
Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual’s ability to compete, survive, and reproduce.
- Law of Conservation of Mass proposed by ……………
5.None of theseAnswer – 3.Antoine Lavoisier
The Law of Conservation of Mass (or Matter) in a chemical reaction can be stated thus – In a chemical reaction, matter is neither created nor destroyed.It was discovered by Antoine Laurent Lavoisier (1743-94) about 1785
- Gay Lussac proposed the which of the following ?
1.Law of Gases
2.Motiom of Planets
3.Theory of Elctromagnetism
4.Law of motion
5.None of theseAnswer – 1.Law of Gases
The expression Gay-Lussac’s law is used for each of the two relationships named after the French chemist Joseph Louis Gay-Lussacand which concern the properties of gases, though it is more usually applied to his law of combining volumes.
- Who proposed the Boyle’s Law ?
5.None of theseAnswer – 1.Boyle
Boyle’s law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant.
- Laws of Electrical Resistance proposed by whom ?
5.None of theseAnswer – 3.Georg Ohm
Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. The law was named after the German physicist Georg Ohm, who, in a treatise published in 1827, described measurements of applied voltage and current through simple electrical circuits containing various lengths of wire.
- ……………………………….. proposed the Raman Effect
5.None of theseAnswer – 4.C.V.Raman
Raman scattering or the Raman effect is the inelastic scattering of a photon. It was discovered by C. V. Raman and K. S. Krishnan in liquids, and by G. Landsberg and L. I. Mandelstam in crystals.The effect had been predicted theoretically by Adolf Smekal in 1923.The effect is specific to the molecules which cause it, and so can be used in spectroscopic analysis.