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BARC Physics — practice by topic

Browse 29 questions across 3 Physics topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Engineering Services (29)Physics (29)Second Law of Thermodynamics (29)

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A process can only be reversible if every step keeps the system at equilibrium. That requirement is:Read the answer and worked solution →A reversible process is best described as:Read the answer and worked solution →In reality, almost all real processes are:Read the answer and worked solution →The sign of an irreversible process is the presence of a finite:Read the answer and worked solution →

Worked practice questions

A process can only be reversible if every step keeps the system at equilibrium. That requirement is:

  1. Quasi static
  2. Quasi stellar
  3. Quasi solid
  4. Quasi sonic
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Correct answer: A. Quasi static

1. The system must never be far from balance. 2. Each step happens very slowly. 3. That requirement is quasi static. _Source: OpenStax University Physics Volume 2, Chapter 4, The Second Law of Thermodynamics._

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A reversible process is best described as:

  1. An inner
  2. An ideal
  3. An icy
  4. An idle
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Correct answer: B. An ideal

1. It is used as a reference case. 2. It hardly ever occurs in practice. 3. So it is an ideal process. _Source: OpenStax University Physics Volume 2, Chapter 4, The Second Law of Thermodynamics._

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In reality, almost all real processes are:

  1. Irreversible
  2. Irregular
  3. Irritating
  4. Irrelevant
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Correct answer: A. Irreversible

1. Something in the surroundings always changes. 2. The original state cannot be fully restored. 3. So real processes are irreversible. _Source: OpenStax University Physics Volume 2, Chapter 4, The Second Law of Thermodynamics._

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