Chapter Exam

Chapter 11: Recent Developments in Physics — Online MCQ Test

Q: What is the typical size range of nanomaterials?

Answer: A. 1 to 100 nanometres — Nanomaterials are defined by at least one dimension in the range of about 1 to 100 nm. This size range gives them special properties.

Q: The branch of science that deals with the study and manipulation of matter at the nanoscale is called:

Answer: B. Nanoscience — Nanoscience studies materials and phenomena at the nanometre scale. It forms the basis of nanotechnology.

Q: A doctor wants to destroy cancer cells without affecting nearby healthy tissue as much as possible. Which modern physics-based method is most suitable?

Answer: A. Targeted radiation therapy — Targeted radiation therapy uses controlled radiation to damage cancer cells. It is designed to reduce harm to surrounding healthy tissues.

PHYSICS · CLASS 12th · Tamil Nadu State Board

Practice Chapter 11: Recent Developments in Physics with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 12th PHYSICS. This chapter covers: The final chapter highlights modern frontiers in physics including nanoscience nanotechnology robotics and medical physics applications. Students explore material synthesis space p.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11: Recent Developments in Physics — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 12th PHYSICS — Chapter 11: Recent Developments in Physics, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the typical size range of nanomaterials?

A. 1 to 100 nanometres ✓
B. 1 to 100 micrometres
C. 1 to 100 millimetres
D. 1 to 100 angstroms only

Answer: A. 1 to 100 nanometres
Nanomaterials are defined by at least one dimension in the range of about 1 to 100 nm. This size range gives them special properties.

The branch of science that deals with the study and manipulation of matter at the nanoscale is called:

A. Astrophysics
B. Nanoscience ✓
C. Geophysics
D. Thermodynamics

Answer: B. Nanoscience
Nanoscience studies materials and phenomena at the nanometre scale. It forms the basis of nanotechnology.

Why do nanomaterials often show properties different from bulk materials?

A. They have fewer atoms and larger mass
B. Surface area to volume ratio becomes significant ✓
C. They cannot conduct electricity
D. They are always made of metals

Answer: B. Surface area to volume ratio becomes significant
At the nanoscale, the surface area to volume ratio is very high. This strongly affects optical, electrical, and chemical properties.

A doctor wants to destroy cancer cells without affecting nearby healthy tissue as much as possible. Which modern physics-based method is most suitable?

A. Targeted radiation therapy ✓
B. Optical fiber communication
C. Magnetic levitation
D. Ultrasonic cleaning

Answer: A. Targeted radiation therapy
Targeted radiation therapy uses controlled radiation to damage cancer cells. It is designed to reduce harm to surrounding healthy tissues.

Which one is the correct meaning of the term 'biomedical engineering' in the context of recent developments in physics?

A. Application of physics and engineering principles to medical diagnosis and treatment ✓
B. Study of animal breeding using chemicals
C. Construction of roads using sensors
D. Only the study of blood composition

Answer: A. Application of physics and engineering principles to medical diagnosis and treatment
Biomedical engineering applies physics, electronics, and engineering methods in healthcare. It supports diagnostic instruments, imaging, and treatment technologies.