NUST NET Physics — Heat and Thermodynamics
Heat and Thermodynamics is part of the FSc Physics course that NUST NET-Engineering draws on (Physics is 60 of the 200 MCQs). It breaks into 3 subtopics, and we hold 68 NET-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (3)
How Heat and Thermodynamics is tested
Across the 8 NET-pattern papers on ParhaiKrlo, Heat and Thermodynamics accounts for 24 questions. It appears in all 8, about 3 questions a paper. The heaviest was NUST NET Past Paper 07, with 3 questions.
| Paper | Questions |
|---|---|
| NUST NET Past Paper 07 | 3 |
| NUST NET Past Paper 08 | 3 |
| NUST NET Past Paper 05 | 3 |
| NUST NET Past Paper 06 | 3 |
| NUST NET Past Paper 03 | 3 |
| NUST NET Past Paper 04 | 3 |
| NUST NET Past Paper 01 | 3 |
| NUST NET Past Paper 02 | 3 |
Heat and Thermodynamics MCQs from the NET-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · NUST NET Past Paper 07 · Heat and Thermodynamics
If the absolute temperature of a gas is quadrupled, the rms speed of its molecules becomes:
- A.4 times
- B.half
- C.2 times
- D.unchanged
Show answer
Answer: C. 2 times — v_rms ∝ √T, so 4T gives 2v_rms.
- Q2 · NUST NET Past Paper 08 · Heat and Thermodynamics
According to the kinetic theory of gases, the pressure of a gas is caused by:
- A.attraction between the molecules
- B.collisions of the molecules with the walls of the container
- C.the weight of the gas
- D.repulsion by the container walls
Show answer
Answer: B. collisions of the molecules with the walls of the container — Gas pressure comes from molecules hitting the walls.
- Q3 · NUST NET Past Paper 05 · Heat and Thermodynamics
The average translational kinetic energy of an ideal-gas molecule is directly proportional to the gas's:
- A.volume
- B.absolute temperature
- C.pressure alone
- D.molecular mass alone
Show answer
Answer: B. absolute temperature — ⟨KE⟩ = (3/2)kT, so it is proportional to T in kelvin.