JEE Physics Physical World MCQs

Question: Origin of the word 'Science' is from

• a) Latin word 'Scientia', which means 'to know'
• b) Greek word 'Scientia
• c) French word 'Scientia
• d) Latin word 'Scientia', which means 'scientific

Answer: Latin word 'Scientia', which means 'to know'

Question: Scientific method involves

• a) Systematic observations, controlled experiments, qualitative and quantitative reasoning, mathematical modelling, prediction and verification
• b) Systematic observations, controlled experiments, qualitative and quantitative reasoning
• c) Systematic observations, controlled experiments, qualitative and quantitative reasoning and mathematical modelling
• d) Systematic observations, controlled experiments, qualitative and quantitative reasoning, mathematical modelling and prediction

Answer: Systematic observations, controlled experiments, qualitative and quantitative reasoning, mathematical modelling, prediction and verification

Question: Origin of the word 'Physics' is from

• a) Greek word 'Fusis', which means 'Nature
• b) French word 'Fusis
• c) Latin word 'Fusis
• d) Greek word 'Fusis', which means 'Physical'

Answer: Greek word 'Fusis', which means 'Nature

Question: Main thrust in physics is on

• a) Both
• b) Reduction
• c) Unification
• d) None of this

Answer: Both

Question: Explaining diverse physical phenomena in terms of a few concepts and laws is

• a) Unification
• b) Reduction
• c) Law
• d) Fact

Answer: Unification

Question: Deriving the properties of a bigger, more complex system from the properties and interaction of its constituent simpler parts is

• a) Reduction
• b) Unification
• c) Law
• d) Fact

Answer: Reduction

Question: Logical possibility that an assertion, hypothesis or a theory can be contradicted by an observation or the outcome of a physical experiment is

• a) Falsifiability
• b) Fact
• c) Hypothesis
• d) Law

Answer: Falsifiability

Question: Which of the following statements is/are correct?

• a) Both
• b) Universal law of gravitation is an assumption or hypothesis
• c) Universal law of gravitation can be verified
• d) None of this

Answer: Both

Question: A theory proposed to explain observed phenomena is

• a) Model
• b) Law
• c) Hypothesis
• d) Postulate

Answer: Model

Question: A truth, which is self-evident is a/an

• a) Either (1) or (2)
• b) Postulate
• c) Axiom
• d) None of this

Answer: Either (1) or (2)

Question: "Science is not just a collection of laws, a catalogue of unrelated facts. It is a creation of human mind, with its freely invented ideas and concepts." Who made these remarks?

• a) Einstein
• b) Raman
• c) Maxwell
• d) Newton

Answer: Einstein

Question: "The most incomprehensible thing about the world is that it is incomprehensible." Who made these remarks?

• a) Einstein
• b) Raman
• c) Maxwell
• d) Newton

Answer: Einstein

Question: We know very little and yet it is astonishing that we know so much, and still more astonishing that so little knowledge (or science) can give us so much power." Who made these remarks?

• a) Bertrand Russel
• b) Einstein
• c) Maxwell
• d) Newton

Answer: Bertrand Russel

Question: "I do not know what I may appear to the world, I seem to have been only like a boy playing on the sea-shore and diverting myself every now and then finding a smoother pebble or a prettier shell than ordinary, while the great ocean of truth lay undiscovered before me." Who said this?

• a) Newton
• b) Maxwell
• c) Einstein
• d) Raman

Answer: Newton

Question: A thought experiment in Physics is one which is

• a) Theoretically possible but experimentally not feasible
• b) Neither theoretically possible nor experimentally feasible
• c) Performed by a non-physicist
• d) Performed by a chemist

Answer: Theoretically possible but experimentally not feasible

Question: In ‘Mesoscopic Physics’, we deal with

• a) Few tens or hundreds of atom
• b) Molecular phenomena
• c) Phenomena at laboratory
• d) Nuclear phenomena

Answer: Few tens or hundreds of atom

Question: "Classical Physics" deals with

• a) Macroscopic phenomena
• b) Microscopic phenomena
• c) Mesoscopic phenomena
• d) Sometimes mesoscopic sometimes microscopic

Answer: Macroscopic phenomena

Question: The scope of physics covers almost

• a) All of these
• b) 10–²² s to 10¹⁸ s range of time
• c) 10^–14 m (or even less) to 10²⁶ m range of length
• d) 10^–30 kg to 10⁵⁵ kg range of mass

Answer:  All of these

Question: Strategy of approximation involves

• a) All the complexities of a phenomena
• b) Extracting essential features of a phenomena from its less significant aspects
• c) Qualitative thinking
• d) None of this

Answer: All the complexities of a phenomena

Question: An Indian scientist who won Nobel Prize for Physics is

• a) Sir. C.V. Raman
• b) M.N. Saha
• c) H.J. Bhaba
• d) Sir J.C. Bose

Answer: Sir. C.V. Raman

Question: Which of the following statements is not true?

• a) Radioactivity was discovered by Madam Curie
• b) X-rays were discovered by Roentgen
• c) Development in medicine may increase average life expectancy
• d) All of these

Answer: Radioactivity was discovered by Madam Curie

Question: Albert Einstein was awarded Nobel Prize for his work on

• a) Photoelectric effect
• b) Special theory of relativity
• c) General theory of relativity
• d) Mass-energy equivalence

Answer: Photoelectric effect

Question: The India born and USA based Nobel Laureate Prof. Chandrasekhara is known for his work on

• a) Stability of stars and existence of a stable mass limit for white dwarfs
• b) Prediction of tachyons
• c) Development of relativistic theory of electron
• d) Study of cosmic rays

Answer: Stability of stars and existence of a stable mass limit for white dwarfs

Question: Abdus Salam, a Pakistan national won Nobel Prize in the field of

• a) Abdus Salam, a Pakistan national won Nobel Prize in the field of
• b) Laser technology
• c) Inelastic scattering of light by molecules
• d) None of this

Answer: Abdus Salam, a Pakistan national won Nobel Prize in the field of

Question: Who gave quantum model of atom?

• a) Bohr
• b) Rutherford
• c) Newton
• d) Faraday

Answer: Bohr

Question: Which of the following statements given below are false?

a. Becquerel discovered radioactivity

b. Fraunhoffer lines were first discovered by Wollaston

c. Photoelectric effect was discovered by Einstein

• a) Photoelectric effect was discovered by Einstein
• b) Fraunhoffer lines were first discovered by Wollaston
• c) Becquerel discovered radioactivity
• d) None of this

Answer: Photoelectric effect was discovered by Einstein

Question: The persons, who were given Nobel prize twice, are

• a) Madame Curie and John Bardeen
• b) John Bardeen and Albert Einstein
• c) Max Planck and Albert Einstein
• d) All of these

Answer: Madame Curie and John Bardeen

Question: The country, which awards the prestigious Nobel prize, is

• a) Sweden
• b) Germany
• c) UK
• d) All three

Answer: Sweden

Question: The scientific principle involved in supercomputers is

• a) Superconductivity
• b) Thermodynamics
• c) Electromagnetic induction
• d) Amplification by population inversion

Answer: Superconductivity

Question: The scientific principle involved in radio and TV broadcast is

• a) Propagation of electromagnetic waves
• b) Amplification by population inversion
• c) Superconductivity
• d) Electromagnetic induction

Answer: Propagation of electromagnetic waves

Question: Choose the correct statement

• a) Both
• b) Electromagnetic force is mediated by the particle 'photon' and gravitational force is mediated by the particle 'graviton
• c) Weak nuclear force is mediated by the particle 'Boson'
• d) None of this

Answer: Both

Question: Choose the correct statement

• a) All of these
• b) Electromagnetic force is conservative
• c) Gravitational force is conservative
• d) Nuclear force is non-conservative

Answer: All of these

Question: Choose the correct statement

• a) All of these
• b) Electromagnetic force is a central force
• c) Gravitational force is a central force
• d) Nuclear force is a non-central force

Answer: All of these

Question: Choose the correct statement

• a) All of these
• b) Nuclear force does not obey inverse square law
• c) Electromagnetic force is affected by intervening medium
• d) Gravitational force is not affected by intervening medium

Answer: All of these

Question: Choose the correct statement

• a) Hans Lippershey is associated with the discovery of telescope
• b) Kepler is associated with the discovery of telescope
• c) C.V. Raman is associated with the discovery of telescope
• d) Hubble is associated with the discovery of telescope

Answer: Hans Lippershey is associated with the discovery of telescope

Question: Choose the correct statement

• a) C.V. Raman is associated with scattering of light by the molecules
• b) Neil Bohr is associated with scattering of light by the molecules
• c) S. Chandrashekhar is associated with scattering of light by the molecules
• d) Heisenberg is associated with radioactivity

Answer: C.V. Raman is associated with scattering of light by the molecules

Question: Choose the correct statement

• a) All of these
• b) James Chadwick is associated with the discovery of neutron
• c) H. Hertz is associated with electromagnetic waves
• d) F. Caree is associated with refrigerator

Answer: All of these

Question: Choose the correct statement.

• a) All of these
• b) Scientific principle involved in rocket propulsion is Newton's laws of motion
• c) Scientific principle involved in steam engine is laws of thermodynamics
• d) Scientific principle involved in refrigerator is laws of thermodynamics

Answer: All of these

Question: Choose the correct statement.

• a) Newton unified celestial and terrestrial mechanics
• b) Maxwell verified experimentally the predictions of the theory of 'electroweak force'
• c) Glashow showed that electricity and magnetism are inseparable aspects of 'electromagnetism
• d) Rubia unified celestial and terrestrial mechanics

Answer: Newton unified celestial and terrestrial mechanics

Question: Choose the correct statement

• a) A conservation law cannot be proved
• b) Charge can be created and destroyed
• c) For angular momentum of a system to remain constant, it is not necessary that external torque acting on it be zero
• d) Law of conservation of linear momentum is valid in the presence of an external force also

Answer: A conservation law cannot be proved

Question: Choose the correct statement

• a) All of these
• b) Isotropy of space is equivalent to law of conservation of angular momentum
• c) Symmetry of nature w.r.t. translation in space is equivalent to law of conservation of linear momentum
• d) Symmetry of nature w.r.t. translation in time is equivalent to law of conservation of energy

Answer: All of these

Question: 

A : Quark-quark force is said to be fundamental force instead of strong nuclear force.

R : Nucleons consist of more fundamental particles known as quarks.

• a) A is correct and R is wrong
• b) R is correct and A is wrong
• c) Both are correct
• d) Both are wrong

Answer: A is correct and R is wrong

Question: 

A : Gravitational force is the weakest force among all other forces.

R : Gravitational force between the two masses is independent of the medium in between

• a) R is correct and A is wrong
• b) Both are wrong
• c) A is correct and R is wrong
• d) Both are correct

Answer: R is correct and A is wrong

Question:

A : Gravitational force dominates terrestrial phenomena.

R : Matter is mostly electrically neutral and gravitational force are only of attractive nature

• a) A is correct and R is wrong
• b) R is correct and A is wrong
• c) Both are correct
• d) Both are wrong

Answer: A is correct and R is wrong

Question:

A : Gravitational force is always attractive but electromagnetic force can be attractive or repulsive.

R : Mass comes only in one variety (there is no negative mass) but charge comes in two varieties. (Positive and negative charge)

• a) A is correct and R is wrong
• b) R is correct and A is wrong
• c) Both are correct
• d) Both are wrong

Answer: A is correct and R is wrong

Question:

A : If m and m0 are moving mass, rest mass of a body and c is velocity of light, then kinetic energy of the body is E = (m – m₀)c2.

R : Total energy of a body is sum of kinetic energy and rest mass energy.

• a) A is correct and R is wrong
• b) R is correct and A is wrong
• c) Both are correct
• d) Both are wrong

Answer: A is correct and R is wrong