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All questions of Important Discoveries Relating to Physics for UPSC CSE Exam
Who discovered the principles of electromagnetic induction?- a)Michael Faraday
- b)Thomas Edison
- c)James Clerk Maxwell
- d)Heinrich Hertz
Correct answer is option 'A'. Can you explain this answer?
Who discovered the principles of electromagnetic induction?
a)
Michael Faraday
b)
Thomas Edison
c)
James Clerk Maxwell
d)
Heinrich Hertz
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Catalyst Learningacademy answered |
Michael Faraday discovered the principles of electromagnetic induction. His experiments demonstrated that a changing magnetic field can induce an electric current in a nearby conductor. Faraday's discoveries laid the groundwork for the development of electric generators and transformers.
Who discovered the laws of planetary motion?- a)Johannes Kepler
- b)Nicolaus Copernicus
- c)Galileo Galilei
- d)Tycho Brahe
Correct answer is option 'A'. Can you explain this answer?
Who discovered the laws of planetary motion?
a)
Johannes Kepler
b)
Nicolaus Copernicus
c)
Galileo Galilei
d)
Tycho Brahe
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Paradigm Institute answered |
Johannes Kepler discovered the laws of planetary motion. His three laws, known as Kepler's laws of planetary motion, describe the motion of planets around the Sun. Kepler's laws laid the foundation for Isaac Newton's laws of motion and universal gravitation.
Who discovered the existence of the electron?- a)J.J. Thomson
- b)Ernest Rutherford
- c)James Chadwick
- d)Marie Curie
Correct answer is option 'A'. Can you explain this answer?
Who discovered the existence of the electron?
a)
J.J. Thomson
b)
Ernest Rutherford
c)
James Chadwick
d)
Marie Curie
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Catalyst Learningacademy answered |
J.J. Thomson discovered the existence of the electron through his experiments on cathode rays. He proposed the "plum pudding" model of the atom, which suggested that electrons were embedded in a positively charged sphere.
Which scientist discovered the concept of radioactivity?- a)Marie Curie
- b)Ernest Rutherford
- c)Wilhelm Conrad Roentgen
- d)Henri Becquerel
Correct answer is option 'D'. Can you explain this answer?
Which scientist discovered the concept of radioactivity?
a)
Marie Curie
b)
Ernest Rutherford
c)
Wilhelm Conrad Roentgen
d)
Henri Becquerel
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Paradigm Institute answered |
Henri Becquerel discovered the concept of radioactivity in 1896. He observed that uranium salts emitted rays that could penetrate opaque materials and expose photographic plates.
Who discovered the law of conservation of energy?- a)James Prescott Joule
- b)Albert Einstein
- c)Isaac Newton
- d)Michael Faraday
Correct answer is option 'A'. Can you explain this answer?
Who discovered the law of conservation of energy?
a)
James Prescott Joule
b)
Albert Einstein
c)
Isaac Newton
d)
Michael Faraday
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Catalyst Learningacademy answered |
James Prescott Joule discovered the law of conservation of energy, also known as the first law of thermodynamics. This law states that energy cannot be created or destroyed; it can only be converted from one form to another.
Which scientist discovered the theory of special relativity?- a)Isaac Newton
- b)Max Planck
- c)Albert Einstein
- d)James Clerk Maxwell
Correct answer is option 'C'. Can you explain this answer?
Which scientist discovered the theory of special relativity?
a)
Isaac Newton
b)
Max Planck
c)
Albert Einstein
d)
James Clerk Maxwell
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Paradigm Institute answered |
Albert Einstein developed the theory of special relativity, which deals with the behavior of objects moving at constant speeds relative to each other. The theory introduced concepts like time dilation and length contraction.
Who discovered the concept of black holes?- a)Albert Einstein
- b)Stephen Hawking
- c)Carl Sagan
- d)Subrahmanyan Chandrasekhar
Correct answer is option 'B'. Can you explain this answer?
Who discovered the concept of black holes?
a)
Albert Einstein
b)
Stephen Hawking
c)
Carl Sagan
d)
Subrahmanyan Chandrasekhar
|
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Catalyst Learningacademy answered |
While the concept of black holes has roots in the works of various scientists, Stephen Hawking made significant contributions to our understanding of black holes through his research on Hawking radiation and black hole thermodynamics.
Who discovered the concept of wave-particle duality for electrons?- a)Max Planck
- b)Albert Einstein
- c)Werner Heisenberg
- d)Louis de Broglie
Correct answer is option 'D'. Can you explain this answer?
Who discovered the concept of wave-particle duality for electrons?
a)
Max Planck
b)
Albert Einstein
c)
Werner Heisenberg
d)
Louis de Broglie
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Catalyst Learningacademy answered |
Louis de Broglie proposed the concept of wave-particle duality for electrons, known as the de Broglie hypothesis. According to this hypothesis, particles such as electrons exhibit both wave and particle-like properties.
Which scientist discovered the principles of quantum electrodynamics?- a)Richard Feynman
- b)Murray Gell-Mann
- c)Paul Dirac
- d)Sheldon Glashow
Correct answer is option 'A'. Can you explain this answer?
Which scientist discovered the principles of quantum electrodynamics?
a)
Richard Feynman
b)
Murray Gell-Mann
c)
Paul Dirac
d)
Sheldon Glashow
|
|
Paradigm Institute answered |
Richard Feynman contributed to the development of quantum electrodynamics (QED). QED is a theory that describes the interactions between charged particles and electromagnetic fields.
Who discovered the theory of general relativity?- a)Max Planck
- b)Albert Einstein
- c)Werner Heisenberg
- d)Niels Bohr
Correct answer is option 'B'. Can you explain this answer?
Who discovered the theory of general relativity?
a)
Max Planck
b)
Albert Einstein
c)
Werner Heisenberg
d)
Niels Bohr
|
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Catalyst Learningacademy answered |
Albert Einstein developed the theory of general relativity, which extended his earlier special theory of relativity. General relativity describes gravity as the curvature of spacetime caused by the presence of mass and energy.
Which scientist discovered the concept of atomic structure and the nucleus?- a)J.J. Thomson
- b)Ernest Rutherford
- c)James Chadwick
- d)Niels Bohr
Correct answer is option 'B'. Can you explain this answer?
Which scientist discovered the concept of atomic structure and the nucleus?
a)
J.J. Thomson
b)
Ernest Rutherford
c)
James Chadwick
d)
Niels Bohr
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Paradigm Institute answered |
Ernest Rutherford discovered the concept of atomic structure and the existence of the nucleus. Through his famous gold foil experiment, Rutherford demonstrated that atoms have a small, dense, positively charged nucleus at their center.
What did James Chadwick discover in 1932?- a)X-rays
- b)Radioactivity
- c)Neutrons
- d)Electrons
Correct answer is option 'C'. Can you explain this answer?
What did James Chadwick discover in 1932?
a)
X-rays
b)
Radioactivity
c)
Neutrons
d)
Electrons
|
|
Paradigm Institute answered |
James Chadwick discovered the existence of neutrons in 1932. Neutrons are subatomic particles found in the nucleus of an atom, along with protons. Chadwick's discovery of neutrons played a crucial role in understanding nuclear reactions and the development of nuclear power.
Which scientist discovered the laws of heredity and genetics?- a)Gregor Mendel
- b)Charles Darwin
- c)Louis Pasteur
- d)Francis Crick
Correct answer is option 'A'. Can you explain this answer?
Which scientist discovered the laws of heredity and genetics?
a)
Gregor Mendel
b)
Charles Darwin
c)
Louis Pasteur
d)
Francis Crick
|
|
Paradigm Institute answered |
Gregor Mendel, an Austrian monk, is known as the father of genetics. He conducted experiments on pea plants and discovered the fundamental principles of heredity, which laid the foundation for the field of genetics.
Which scientist discovered the wave-particle duality of light?- a)Max Planck
- b)Albert Einstein
- c)Niels Bohr
- d)Thomas Young
Correct answer is option 'D'. Can you explain this answer?
Which scientist discovered the wave-particle duality of light?
a)
Max Planck
b)
Albert Einstein
c)
Niels Bohr
d)
Thomas Young
|
|
Paradigm Institute answered |
Thomas Young conducted the famous double-slit experiment, which demonstrated the wave-particle duality of light. His experiment showed that light behaves both as a wave and as a particle.
Who discovered the principle of superposition in quantum mechanics?- a)Werner Heisenberg
- b)Max Born
- c)Erwin Schrödinger
- d)Louis de Broglie
Correct answer is option 'B'. Can you explain this answer?
Who discovered the principle of superposition in quantum mechanics?
a)
Werner Heisenberg
b)
Max Born
c)
Erwin Schrödinger
d)
Louis de Broglie
|
|
Catalyst Learningacademy answered |
Max Born contributed to the development of quantum mechanics and discovered the principle of superposition. The principle states that a quantum system can exist in multiple states simultaneously until observed or measured.
Which scientist discovered the laws of thermodynamics?- a)James Clerk Maxwell
- b)Rudolf Clausius
- c)Lord Kelvin
- d)Isaac Newton
Correct answer is option 'B'. Can you explain this answer?
Which scientist discovered the laws of thermodynamics?
a)
James Clerk Maxwell
b)
Rudolf Clausius
c)
Lord Kelvin
d)
Isaac Newton
|
|
Paradigm Institute answered |
Rudolf Clausius is known for formulating the laws of thermodynamics. His work laid the foundation for understanding the principles governing energy transfer and conversion in various systems.
Which scientist proposed the theory of relativity?- a)Isaac Newton
- b)Max Planck
- c)Albert Einstein
- d)Marie Curie
Correct answer is option 'C'. Can you explain this answer?
Which scientist proposed the theory of relativity?
a)
Isaac Newton
b)
Max Planck
c)
Albert Einstein
d)
Marie Curie
|
|
Catalyst Learningacademy answered |
Albert Einstein proposed the theory of relativity, which revolutionized our understanding of space, time, and gravity. His theory of relativity consists of two parts: the special theory of relativity and the general theory of relativity.
Which scientist discovered the concept of quantum mechanics?- a)Werner Heisenberg
- b)Niels Bohr
- c)Erwin Schrödinger
- d)Max Planck
Correct answer is option 'C'. Can you explain this answer?
Which scientist discovered the concept of quantum mechanics?
a)
Werner Heisenberg
b)
Niels Bohr
c)
Erwin Schrödinger
d)
Max Planck
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|
Paradigm Institute answered |
Erwin Schrödinger is known for his contributions to the development of quantum mechanics. He formulated the Schrödinger equation, which describes the behavior of quantum particles, such as electrons, in terms of wave functions.
Who is credited with discovering the concept of gravity?- a)Isaac Newton
- b)Albert Einstein
- c)Galileo Galilei
- d)Nikola Tesla
Correct answer is option 'A'. Can you explain this answer?
Who is credited with discovering the concept of gravity?
a)
Isaac Newton
b)
Albert Einstein
c)
Galileo Galilei
d)
Nikola Tesla
|
|
Catalyst Learningacademy answered |
Isaac Newton is credited with discovering the concept of gravity through his work on the laws of motion and universal gravitation. His famous law of gravitation states that every mass attracts every other mass with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
Who discovered the laws of motion?- a)Isaac Newton
- b)Galileo Galilei
- c)Nikola Tesla
- d)Johannes Kepler
Correct answer is option 'A'. Can you explain this answer?
Who discovered the laws of motion?
a)
Isaac Newton
b)
Galileo Galilei
c)
Nikola Tesla
d)
Johannes Kepler
|
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Catalyst Learningacademy answered |
Isaac Newton discovered the laws of motion, which are fundamental principles governing the motion of objects. His laws, known as Newton's laws of motion, laid the foundation for classical mechanics.
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