Grades/ Grade 12/ Physics/Unit 7 · Physics of Solids

Class XII · Physics · Chapter 7

Physics of Solids — three ways to learn it.

Build a crystal lattice atom by atom, stretch a wire until it snaps, and watch the energy bands of a conductor, insulator and semiconductor light up. Pick any door — they all teach the same chapter.

Choose how you want to learn

Lecture & walkthrough

The complete written lesson — crystalline vs amorphous solids, the classification of solids, stress, strain and Young's modulus with Hooke's law, the energy-band model of conductors, insulators and semiconductors, and superconductivity.

8 sections · ~25 min read

Open the lecture →

Interactive lecture

As you scroll, a live animated panel brings every idea to life: atoms snap into a repeating lattice, a wire stretches and snaps along its stress–strain curve, and the valence and conduction bands fill up for a conductor, insulator and semiconductor.

Same content · live animation per section

Open the interactive lecture →

Run the Young's-modulus experiment on a safe, virtual bench — hang loads on a wire, measure its extension and plot extension against load to find the modulus of the material.

Hands-on · extension vs load apparatus

Enter the virtual lab →

Test yourself

📝 Practice — board MCQs & solved numericals ← Back to all chapters

One chapter, three doors

Read it, build the lattice and stretch the wire, then check yourself.