Cluster · Famous Scientists and Scientific Discoveries

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Famous Physicists Discoveries and Laws
Questions
227
Questions in this cluster
227 total
Question Category Subtype Difficulty

Which postulate of Bohr’s model of the atom explains the stability of electron orbits and how is this stability achieved according to the model?

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bihar_police intermediate

Which of the following pairs of physicists and their contributions/discoveries is INCORRECT?

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bihar_police intermediate

The SI unit of radioactivity, representing the activity of a quantity of radioactive material, is named after which scientist?

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bihar_police intermediate

Match the following physical phenomena with their respective principles or laws:

Column A Column B
1. Photoelectric Effect A) Describes the relationship between the angle of incidence and the angle of refraction.
2. Snell's Law B) States that planets move in elliptical orbits with the Sun at one focus.
3. Kepler's First Law C) Describes the emission of electrons from a material when light is incident on it.
4. Faraday's Law of Induction D) States that the induced electromotive force is proportional to the rate of change of magnetic flux.
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bihar_police match_following intermediate

As per physicists and their major contributions/discoveries, which of the following pair is INCORRECT?

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bihar_police intermediate

The theory that dinosaurs were driven to extinction by the aftermath of a large asteroid impact on Earth was given by ________.

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bihar_police intermediate

Which among the following first predicted existence of the Demon Particle?

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bihar_police intermediate

Who was the first to experimentally determine the value of the universal gravitational constant (G)?

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bihar_police intermediate

Which atomic model discovered the nucleus of an atom?

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bihar_police intermediate

Which among the following scientists proposed that no two electrons can occupy the same quantum state simultaneously?

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bihar_police intermediate

According to the Quantum Theory of Plank, what is the nature of Electromagnetic radiation?

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bihar_police intermediate

Which of the following particles were made to fall on a thin gold foil by Ernest Rutherford?

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bihar_police intermediate

Which of the following quantum numbers can distinguish between two electrons present in the same orbital?

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bihar_police intermediate

Rutherford's alpha particles scattering experiment resulted into the discovery of _____.

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rajasthan intermediate

Becquerel, which is equal to one disintegration per second (dps) is represented by which symbol?

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up_police intermediate

Who is known as the 'father of nuclear physics'?

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Which of the following pairs of physicists and their contributions/discoveries is INCORRECT?

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up_police intermediate

The photoelectric effect demonstrates which nature of light?

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up_police intermediate

With the Theory of Relativity, __________________ transformed the landscape of physics, this theory majority contributed to designing the theory of Quantum Mechanics.

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rpf intermediate

Theory of Relativity was given by:

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rpf intermediate

Which atomic model discovered the nucleus of an atom?

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Which law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium?

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The theory of Relativity was proposed by _______. 

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rpf intermediate

Which of the following is discrete in Bohr's theory?

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rpf intermediate

When did Heinrich Hertz discover the photoelectric effect and observe that shining ultraviolet light on the electrodes caused a change in voltage between them?

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defence intermediate

Which of the following principles explains why no two electrons in the same atom can have the same set of four quantum numbers?

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defence intermediate

The _______ explains how electrons fill up orbitals and shells inside an atom.

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Match the following.

Discoveries Scientist Name
A.Proton 1.Anderson
B.Positron 2.Pauli
C.Oxygen 3.Priestley
D.Neutrino 4.Rutherford

 

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defence match_following intermediate

Which postulate of Bohr’s model of the atom explains the stability of electron orbits and how is this stability achieved according to the model?

pipeline-1272647
defence intermediate

Which of the following pairs of physicists and their contributions/discoveries is INCORRECT?

pipeline-1252041
defence intermediate

Match the following physical phenomena with their respective principles or laws:

Column A Column B
1. Photoelectric Effect A) Describes the relationship between the angle of incidence and the angle of refraction.
2. Snell's Law B) States that planets move in elliptical orbits with the Sun at one focus.
3. Kepler's First Law C) Describes the emission of electrons from a material when light is incident on it.
4. Faraday's Law of Induction D) States that the induced electromotive force is proportional to the rate of change of magnetic flux.
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defence match_following intermediate

“The electron revolves around the centre of the atom in a circular path without “losing energy.” Who said this? 

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defence intermediate

Which of the following pairs of physicists and their contributions/discoveries is INCORRECT?

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ib intermediate

Which postulate of Bohr’s model of the atom explains the stability of electron orbits and how is this stability achieved according to the model?

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ib intermediate

Which of the following principles explains why no two electrons in the same atom can have the same set of four quantum numbers?

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By observing the motion of objects on an inclined plane, ______ deduced that objects move with a constant speed when no force acts on them.

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J. J. Thomson received the Nobel Prize in Physics for the discovery of _____.

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By observing the motion of objects on an inclined plane ______ deduced that objects move with a constant speed when no force acts on them.

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The Law of Gravitation was given by _______.

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Who discovered the electron?

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Who is known as the 'father of nuclear physics'?

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Which of the following pairs of physicists and their contributions/discoveries is INCORRECT?

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The three laws of motion were proposed by:

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When did Heinrich Hertz discover the photoelectric effect and observe that shining ultraviolet light on the electrodes caused a change in voltage between them?

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railways intermediate

In 1928, which equation was derived and combines quantum theory and special relativity to describe the behaviour of an electron moving at a relativistic speed?

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railways intermediate

In 1932, who discovered the positron, a particle described as ‘carrying a positive charge but having a mass of the same order of magnitude as that normally possessed by a free negative electron’?

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...................... was awarded the Nobel Prize in Physics in 1909 along with Karl Ferdinand Braun for the development of practical wireless telegraphy.

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Which British scientist is known for developing the principle of holography in 1947 to improve the resolution of the electron microscope?

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The quantum theory of light was given by:

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For which discovery did William Bradford Shockley, John Bardeen and Walter Houser Brattain jointly receive the Nobel Prize in Physics in 1956?

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