JAC Class 11 Physics MCQ Chapter-9: Mechanical Properties of Fluids

1. Unit of Pressure is-

  • Dyne
  • N-m
  • Pascal (Pa)
  • Nm²
Answer
Pascal (Pa)

2. Unit of Thrust is –

  • Pascal (Pa)
  • Erg
  • Newton
  • N-m²
Answer
Newton

3. Unit of Density is –

  • Kg.m
  • Kg.m⁻³
  • Kg.m²
  • Kg.m³
Answer
Kg.m⁻³

4. The dimension of Pressure is –

  • [ML⁻¹T⁻²]
  • [ML⁻³]
  • [MLT⁻¹]
  • None of these
Answer
[ML⁻¹T⁻²]

5. The dimension of Density is-

  • [ML⁻¹T⁻²]
  • [ML⁻³]
  • [MLT⁻¹]
  • None of these
Answer
[ML⁻³]

6. Which of the following instrument is used for measuring atmospheric! pressure?

  • Thermometer
  • Barometer
  • Manometer
  • Hydrometer
Answer
Barometer

7. Which of the following instrument is used for measuring gauge pressure?

  • Thermometer
  • Manometer
  • Hydrometer
  • Barometer
Answer
Manometer

8. Hydraulic brakes are based on which law?

  • Torricelli’s Law
  • Boyle’s Law
  • Pascal’s Law
  • Newton’s Law
Answer
Pascal’s Law

9. Hydraulic lifts are based on which law?

  • Torricelli’s Law
  • Pascal’s Law
  • Newton’s Law
  • Newton’s Law
Answer
Pascal’s Law

10. A force of 40 N is applied on a nail, whose tip has an area of cross-section of 0.001 cm². The pressure on the tip is –

  • 4 x 10⁸ Nm⁻²
  • 4 x 10⁸ Nm²
  • 4 x 10⁴ Nm⁻²
  • None of these
Answer
4 x 10⁸ Nm⁻²

11. Which of the following is associated with liquid only and not for gases?

  • Surface tension
  • Pressure
  • Volume
  • Density
Answer
Surface tension

12. Applications of Bernoulli’s theorem can be seen in –

  • dynamic lift of an airplane
  • hydraulic press
  • helicopter
  • None of these
Answer
dynamic lift of an airplane

13. S. I. unit of surface tension is –

  • Nm
  • Nm⁻¹
  • Nm⁻²
  • Nm⁻³
Answer
Nm⁻¹

14. S. I. unit of coefficient of viscosity –

  • poise
  • dyne
  • erg
  • henry
Answer
poise

15. On the increasing temperature, the surface tension –

  • Increases
  • Decreases
  • Remains unchanged
  • None of these
Answer
Decreases

16. The dimension of viscosity is –

  • [MLT⁻²]
  • [ML⁻¹T⁻²]
  • [ML²T⁻²]
  • None of these
Answer
[ML⁻¹T⁻²]

17. The coefficient of viscosity of a liquid, on increasing temperature –

  • increases
  • Decreases
  • remains constant
  • None of these
Answer
Decreases

18. When the temperature is increased, the angle of contact of a liquid –

  • increases
  • Decreases
  • remains constant
  • None of thes
Answer
Decreases

These JAC MCQs for class 11 Physics will help students prepare for the board exam. For more study materials, such as solutions, model papers, syllabus, MCQ Questions, and the latest updates on the JAC Board, please visit our website at JACBoardSolutions.com.

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