Chapter 8 of 11
Concept Maps
Atomic and Nuclear physics — Concept Maps
Tamil Nadu Board · Class 12 · Physics
3 concept maps of Atomic and Nuclear physics for Tamil Nadu Board Class 12 Physics, each also written out as a text outline.
44 questions25 flashcards5 concepts
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3 Concept Maps
Process of gas discharge at decreasing pressures showing emergence of cathode rays
The map in words
- Gas at Normal Pressure
- Reduce Pressure: ~100 mm Hg
- Irregular Discharge: Streaks of Light
- Reduce More: ~10 mm Hg
- Positive Column Forms: Light Between Electrodes
- Reduce Further: ~0.01 mm Hg
- Cathode Rays Appear: Electrons Flow from Cathode
- Properties: Deflected by E and B fields
- Properties: Produce Fluorescence
- Properties: Create X-rays
- Cathode Rays Appear: Electrons Flow from Cathode
- Reduce Further: ~0.01 mm Hg
- Positive Column Forms: Light Between Electrodes
- Reduce More: ~10 mm Hg
- Irregular Discharge: Streaks of Light
- Reduce Pressure: ~100 mm Hg
Sequence of Thomson's experiment showing force balance and deflection measurement
The map in words
- Cathode → Field: Electrons enter at velocity v
- Field → Field: Electric force eE downward
- Field → Field: Magnetic force eBv upward
- Field → Screen: Straight path to center O
- Field → Screen: Deflected to distance y
- Screen → Screen: Calculate e/m from deflection
Millikan experiment procedure showing charge quantization discovery
The map in words
- Oil Droplet Sprayed
- Friction: Acquire Negative Charge
- Electric Field OFF
- Terminal Velocity: mg = f_viscous
- From Stokes Law: Calculate Radius r
- Terminal Velocity: mg = f_viscous
- Electric Field OFF
- Friction: Acquire Negative Charge
- Electric Field ON
- Adjust Field: Droplet Stationary
- Force Balance: qE = mg - buoyant force
- Solve for q: Charge on Droplet
- Pattern: q = ne, where n is integer
- Average: e = 1.6 × 10⁻¹⁹ C
- Pattern: q = ne, where n is integer
- Solve for q: Charge on Droplet
- Force Balance: qE = mg - buoyant force
- Adjust Field: Droplet Stationary
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Explore DiagramsFrequently Asked Questions
What are the important topics in Atomic and Nuclear physics for Tamil Nadu Board Class 12 Physics?
Key topics in Atomic and Nuclear physics include Electric Discharge Through Gases and Cathode Rays, Atomic Models: Thomson, Rutherford, and Bohr, Atomic Spectrum and Hydrogen Spectrum, Nuclear Structure and Properties. Study these first, then practise questions on each for the Tamil Nadu Board Class 12 board exam.
What do the concept maps for Atomic and Nuclear physics show?
The 3 maps show how the ideas in Atomic and Nuclear physics connect: Process of gas discharge at decreasing pressures showing emergence of cathode rays; Sequence of Thomson's experiment showing force balance and deflection measurement. Each map is also written out as an outline on this page.
How should I revise Atomic and Nuclear physics for the Tamil Nadu Board Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Atomic and Nuclear physics. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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