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होम › भौतिकी › Heat and Thermodynamics

Heat and Thermodynamics — Physics Questions & Practice

7 Heat and Thermodynamics questions from Physics for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong. का अभ्यास करें

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Heat and Thermodynamics पर अभ्यास प्रश्न — उत्तर सहित

Try each question first, then open the answer. Explanations are included.

1. What is the lowest possible temperature, at which a system has minimal thermal energy, defined as 0 Kelvin?

  1. AThe freezing point of water
  2. BRoom temperature
  3. CThe boiling point of water
  4. DAbsolute zero
उत्तर दिखाएँ

उत्तर: D

Absolute zero (0 Kelvin, or -273.15C) is the theoretical lowest possible temperature, at which particles have minimal thermal motion.

2. What term describes the transfer of heat through electromagnetic waves, not requiring a medium?

  1. ADiffusion
  2. BConvection
  3. CRadiation
  4. DConduction
उत्तर दिखाएँ

उत्तर: C

Radiation is the transfer of heat via electromagnetic waves and can occur through a vacuum, e.g., heat from the Sun reaching Earth.

3. What term describes the transfer of heat through direct contact between particles of matter?

  1. ARadiation
  2. BConduction
  3. CInsulation
  4. DConvection
उत्तर दिखाएँ

उत्तर: B

Conduction is the transfer of heat through direct molecular contact, common in solids like metals.

4. The first law of thermodynamics is essentially a statement of which broader physical principle?

  1. AConservation of mass
  2. BIncrease of entropy
  3. CConservation of energy
  4. DConservation of momentum
उत्तर दिखाएँ

उत्तर: C

The first law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another - a statement of the conservation of energy.

5. What term describes the transfer of heat through the movement of fluid (liquid or gas) particles?

  1. AConduction
  2. BInsulation
  3. CConvection
  4. DRadiation
उत्तर दिखाएँ

उत्तर: C

Convection is the transfer of heat via the movement of fluid particles, common in liquids and gases (e.g., boiling water, atmospheric currents).

Heat and Thermodynamics और प्रश्न हल करें

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