Chapter Exam

Chapter 7: Properties of Matter — Online MCQ Test

Q: What is the SI unit of Young's Modulus?

Answer: C. N/m² — Young's modulus is defined as stress divided by strain. Since strain is dimensionless, the unit is the same as stress, which is N/m² or Pascal.

Q: Which principle states that the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel?

Answer: C. Pascal's law — Pascal's law describes the behavior of pressure transmission in an enclosed fluid.

Q: A hydraulic lift is designed to lift a car using a small force. This device works on the principle of:

Answer: B. Pascal's law — Hydraulic systems use Pascal's law to multiply force by utilizing pressure transmission through an enclosed fluid.

Q: A steel wire and a copper wire of the same length and same radius are connected in series and subjected to a load. If the Young's modulus of steel is greater than that of copper, which statement is true?

Answer: C. Stress is same in both — When connected in series, the same tension (force) acts on both, and since they have the same cross-sectional area, the stress is the same.

Q: Two soap bubbles of radii r1 and r2 (r1 < r2) are connected by a capillary tube. What happens?

Answer: B. Air flows from r2 to r1 — Pressure inside a bubble is inversely proportional to its radius; therefore, the smaller bubble has higher pressure and air flows to the larger bubble.

PHYSICS · CLASS 11th · Tamil Nadu State Board

Practice Chapter 7: Properties of Matter with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th PHYSICS. This chapter covers: This chapter details elasticity Hooke Law Young modulus fluids pressure Pascal Law Archimedes principle. Students study fluid dynamics Bernoulli theorem viscosity Surface tension a.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 7: Properties of Matter — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th PHYSICS — Chapter 7: Properties of Matter, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the SI unit of Young's Modulus?

A. N m
B. N/m
C. N/m² ✓
D. N/m³

Answer: C. N/m²
Young's modulus is defined as stress divided by strain. Since strain is dimensionless, the unit is the same as stress, which is N/m² or Pascal.

Which principle states that the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel?

A. Archimedes' principle
B. Bernoulli's principle
C. Pascal's law ✓
D. Stokes' law

Answer: C. Pascal's law
Pascal's law describes the behavior of pressure transmission in an enclosed fluid.

A hydraulic lift is designed to lift a car using a small force. This device works on the principle of:

A. Archimedes' principle
B. Pascal's law ✓
C. Bernoulli's principle
D. Torricelli's law

Answer: B. Pascal's law
Hydraulic systems use Pascal's law to multiply force by utilizing pressure transmission through an enclosed fluid.

A steel wire and a copper wire of the same length and same radius are connected in series and subjected to a load. If the Young's modulus of steel is greater than that of copper, which statement is true?

A. Stress is greater in steel
B. Strain is greater in steel
C. Stress is same in both ✓
D. Strain is same in both

Answer: C. Stress is same in both
When connected in series, the same tension (force) acts on both, and since they have the same cross-sectional area, the stress is the same.

Two soap bubbles of radii r1 and r2 (r1 < r2) are connected by a capillary tube. What happens?

A. Air flows from r1 to r2
B. Air flows from r2 to r1 ✓
C. Air does not flow
D. Bubbles merge into one of radius r1+r2

Answer: B. Air flows from r2 to r1
Pressure inside a bubble is inversely proportional to its radius; therefore, the smaller bubble has higher pressure and air flows to the larger bubble.

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