Deformation In Solids Class 11 Physics||Physics Of Solids Class 11 Physics NBF||By Danish Majeed

⭐ Deformation In Solids Class 11 Physics || Physics of Solids || By Danish Majeed

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In this video, Danish Majeed explains one of the most important and fundamental topics from Class 11 NBF Physics — Deformation in Solids. This lecture is part of the Physics of Solids chapter where you will understand how solids change shape when external forces act on them.

🧱 Topics Covered in This Lecture
🔹 What is Deformation?

Deformation is the change in shape or size of a solid when an external force is applied.
Solids deform but return to their original shape if the force is within limits.

🔹 Types of Deformation

1️⃣ Elastic Deformation

Temporary

Object returns to original shape when force is removed

Governed by Hooke’s Law

2️⃣ Plastic Deformation

Permanent deformation

Object does NOT return to original shape

Occurs beyond elastic limit or yield point

🔹 Stress and Strain (Basics Included)

✔ Stress = Force applied per unit area
✔ Strain = Fractional change in length
✔ They help us measure how much a solid deforms.

🔹 Hooke’s Law
Stress ∝ Strain
Valid only within the elastic limit.

🔹 Stress–Strain Graph Explained

Proportional limit

Elastic region

Yield point

Plastic region

Breaking point

Students will understand how materials behave under increasing load and why different solids have different strength.

🔹 Examples in Real Life:

🔧 Stretching of a spring
🏋️‍♂️ Load on metal beams
🚗 Car body deformation during impact
🏗️ Elasticity in buildings and bridges

💡 Why This Lecture Is Important?

Because Deformation In Solids Class 11 Physics || Physics of Solids || By Danish Majeed builds the foundation for understanding:

Mechanics of materials

Engineering physics

Designing safe structures

Elasticity & plasticity

Real-life application of stress–strain concepts

Lecture includes:
✅ Conceptual clarity
✅ Real-life examples
✅ NBF exam-oriented short questions
✅ Stress–strain graph explanation

🔔 Stay Connected

Subscribe for more lectures on:
📘 Physics of Solids
📗 Fluid Mechanics
📙 Rotational Motion
📕 Thermal Physics
📘 Modern Physics

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⭐ Deformation In Solids Class 11 Physics || Physics of Solids || By Danish Majeed – Complete explanation of elastic & plastic deformation, stress, strain, and Hooke’s law with real-life examples. Perfect for NBF Class 11 exam preparation and conceptual clarity!

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