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 general knowledge science & technology

Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

  1. Pressure and Young's modules

  2. Planck's constant and Angular momentum

  3. Impulse and moment of force

  4. Force and rate of change of linear momentum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Impulse has dimensions of force × time = MLT^-1. Moment of force (torque) has dimensions of force × distance = ML^2T^-2. These are fundamentally different. Planck's constant and angular momentum both have ML^2T^-1. Pressure and Young's modulus both have ML^-1T^-2. Force and rate of change of momentum both have MLT^-2.

Multiple choice softskills leadership

Choose the perfect one

  1. Fluctuation

  2. Fluktuation

  3. Fluctuasion

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

The correct spelling is 'Fluctuation', derived from the Latin 'fluctuare'. Options with 'k', 's', or 'si' are incorrect phonetic attempts that do not follow standard English orthography for this noun.

Multiple choice softskills communication

Meaning of QUANTUM...

  1. huge

  2. large amount

  3. very small amount

  4. tiny
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Quantum refers to the smallest discrete unit of something, as in quantum mechanics where energy comes in tiny packets. In everyday usage, it means a very small amount or quantity of something.

Multiple choice softskills leadership

Quantum Physics is ____________ study.

  1. difficult for

  2. difficult to

  3. a difficult

  4. difficult in
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct idiom is difficult followed by to when describing an action that is hard to perform. Difficult for would need an object like difficult for students. A difficult is just a noun phrase without proper grammatical connection.

Multiple choice technology databases

An atomic field is

  1. a key that contains only a single field

  2. a key field

  3. a numerical field

  4. a single valued field
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An atomic field contains a single, indivisible value that cannot be meaningfully broken down further. This is a fundamental principle of First Normal Form (1NF) in database design. Atomic fields are not about being keys (A, B), numerical (C), or having specific values - they're about being single-valued rather than multi-valued or composite.

Multiple choice technology architecture

An atomic field is

  1. a key that contains only a single field

  2. a key field

  3. a numerical field

  4. a single valued field
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An atomic field contains only a single value and cannot be meaningfully broken down further. This is a fundamental concept in First Normal Form (1NF), which requires that every field contain only atomic (indivisible) values to eliminate repeating groups within a record.

Multiple choice

Consider the following statements regarding the waves associated with a moving electron (Matter waves):

  1. Matter waves can move with a velocity greater than that of light
  2. They can exhibit the phenomenon of interference
  3. They represent the probability of finding the electrons at different points in space
  4. They are elastic waves

  1. 1, 2 and 3

  2. 2, 3 and 4

  3. 1, 3 and 4

  4. 1, 2, 3 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is false - matter waves cannot exceed the speed of light as they are not physical waves but probability waves. Statement 2 is correct - matter waves exhibit interference patterns. Statement 3 is correct - matter waves represent probability amplitude of finding electrons at different positions. Statement 4 is false - matter waves are not elastic waves (they don't involve physical deformation of a medium). Therefore, only statements 2 and 3 are correct.

Multiple choice

According to a science magazine, discovering 'anti-matter' is still a fantasy of most young nuclear physicists, like that of earlier generations of nuclear physicists.

  1. like that of earlier generations

  2. as those from earlier generations

  3. like had earlier generations

  4. as it was of earlier generations
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct. The option correctly uses 'as' for comparison. Also, 'is still a fantasy' is correctly followed by 'as it was of earlier generations'.

Multiple choice

The principle underlying a micro wave is similar to ____.

  1. heat generated by nuclear power

  2. thermal radiation

  3. radioactivity

  4. electromagnetic waves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Microwaves work by generating electromagnetic waves that excite water molecules in food, creating heat. This process is fundamentally based on thermal radiation - the transfer of heat through electromagnetic waves.