Physics

Matter and Quantum Mechanics

1,427 Questions

This topic addresses core concepts in quantum mechanics, statistical thermodynamics, and states of matter. Questions cover quantum field theory, particle behavior, and statistical distributions. This material is essential for physics competitive exams.

Statistical ensemblesQuantum field theoryParticle physicsStates of matterWave particle duality

Matter and Quantum Mechanics Questions

Multiple choice physics bharat and science scope and progress of physics recent advancement in medical technology contribution of physics in technology and society

Bose-Einstein condensate is based on which scientific principle?

  1. Magnetic confinement of plasma

  2. Trapping and cooling of atoms by laser beams and magnetic fields

  3. Wave nature of electrons

  4. Motion of charged particles in electromagnetic fields
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bose-Einstein  condensate is made by trapping and cooling of atoms by laser beams and magnetic fields.

Multiple choice chemistry what is inside atom discovery of neutrons structure of atoms discovery of subatomic particles

Why did Chadwick thought that the emerging particles on radiations were not photons?

  1. Energy of the emerging particles was very low as compared to photon

  2. Energy of the emerging particles was equal to photon

  3. Energy of the emerging particles was much more than the photons

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chadwick carried out the experiments, using many different elements as radiation targets besides paraffin. By comparing the energies of particles ejected from all these various targets, Chadwick was able to prove that the radiation causing the ejected particles was much more energetic than could be accounted for by photons.

Multiple choice physics physical world introduction to science contribution of physics in technology and society physics in relation to other sciences

Name the latest theory of fundamental physics in which the basic entity is a one-dimensional object as against the 'zero-dimensional' points representing the elementary particles.

  1. String theory

  2. Supersymmetry

  3. Symmetry

  4. Superstring theory
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In String theory, the basic entity is a one dimensional object.

Multiple choice physics physical world introduction to science contribution of physics in technology and society physics in relation to other sciences

Nano science is the study of fundamental principles that nature permits at the nanoscale or less than that $i e . . . . . . . . . . . .$ 

  1. The classical mechanics

  2. the wave mechanics

  3. The quantum mechanics

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nanoscience deals with materials at the scale of 1 to 100 nanometers. At this scale, classical physics fails, and the behavior of matter is governed by quantum mechanical effects.

Multiple choice evs light and shadow dual nature of light nature and sources of light theories on light

Albert Einstein used corpuscular theory to explain :

  1. $E=mc^2$

  2. The photoelectric effect

  3. Quantisation of charge

  4. magic of light
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The photoelectric effect

In 1905, Albert Einstein published a paper in advancing hypothesis that the light energy I'd being carried in discrete quantized packets to explain experimental data from photoelectric effect. This model contributed the development of quantum mechanics.
Photoelectric effect refers to the emission, or rejection of electrons grim the surface of generally a metal in response to the incident light. 

Multiple choice physics behaviour of perfect gas and kinetic theory of gases mean free path law of equipartition of energy and mean free path behavior of perfect gas and kinetic theory

In physics, the mean free path is the average distance traveled by a moving particle (such as an atom , a molecule, a photon) between successive impacts (collisions), which modify its direction or energy or other particle properties. In which of the following mean free path is used ?

  1. to estimate the resistivity of a material

  2. to design a chemical apparatus

  3. It can be used in optics and in acoustics

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The concept of mean free path is popular in all branches of physics and it has a number of applications including estimation of resistivity of material, designing a chemical apparatus, and optics and acoustics, etc.

Multiple choice evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

Which of the following is the correct properties of matter?

  1. have no mass but occupies space

  2. have mass but occupies no space

  3. have no mass and occupies no space

  4. it have mass and occupies space
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Matter is something that has mass and occupies space. 


It can be living or non-living. 

Hence the correct option is D.

Multiple choice evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

Which of the following is a state of matter?

  1. Quark-gluon plasma

  2. Quantum spin liquid

  3. Superfluid

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

There are more phases of matter which aren't as familiar nor do we see them every day. Some exist only in theory, others can be reproduced in laboratories, some are so new that scientists are still figuring out the details and others might exist, but have not yet been found in nature. They include: quark-gluon plasmas, Bose-Einstein condensates, fermionic condensates, strange matter, liquid crystals, quantum spin liquid (QSL), superfluids, supersolids and the paramagnetic and ferromagnetic phases of magnetic materials.