Chapter 12 of 30
Concept Maps
Heat Transfer and Solar Energy — Concept Maps
NIOS · Class 12 · Physics
4 concept maps of Heat Transfer and Solar Energy for NIOS Class 12 Physics, each also written out as a text outline.
45 questions34 flashcards17 formulas & key relations5 concepts
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4 Concept Maps
Heat Transfer and Solar Energy — Complete Chapter Overview
The map in words
- Heat Transfer and Solar Energy
- Conduction
- Mechanism
- Atomic vibrations
- No bodily movement
- Formula
- Q = KA Th-Tc t divided by d
- Thermal Conductivity K
- Unit Wm-1K-1
- Copper 400
- Air 0.025
- Thermocole 0.01
- Applications
- Cooking vessels
- Woollen clothes
- Ice boxes
- Mechanism
- Convection
- Mechanism
- Bodily fluid movement
- Density change
- Buoyancy driven
- Types
- Natural sea breezes
- Forced cooling fans
- Examples
- Monsoon
- Sea breeze
- Boiling water
- Mechanism
- Radiation
- Nature
- Electromagnetic waves
- No medium needed
- Speed 3x10^8 m per s
- Wien Displacement Law
- Lambda-m times T = constant
- Constant = 2.884x10^-3 mK
- Stefan Boltzmann Law
- E = Ae sigma T^4
- sigma = 5.67x10^-8
- Kirchhoff Law
- Good absorber = Good emitter
- Black body absorbs all
- Black Body
- Absorptive power = 1
- Fery black body design
- Emissivity
- 0 to 1
- Ratio of E to Eb
- Nature
- Solar Energy
- Solar Constant
- 1360 Wm-2 for Earth
- Inverse square law
- Greenhouse Effect
- CO2 traps infrared
- Global warming
- Melting glaciers
- Newton Cooling Law
- Rate proportional to excess temp
- Valid for small difference
- Derived from Stefan law
- Solar Constant
- Conduction
Heat Transfer and Solar Energy — Chapter Concept Map
The map in words
- Heat Transfer and Solar Energy
- Modes of Heat Transfer
- Conduction
- Requires medium
- No molecular movement
- Formula Q = KA dT t over d
- Thermal conductivity K
- Convection
- Requires fluid medium
- Bodily molecular movement
- Buoyancy driven
- Sea breeze and Monsoon
- Radiation
- No medium needed
- Electromagnetic waves
- Speed of light
- Infrared and visible
- Conduction
- Radiation Laws
- Wien Displacement Law
- Lambda m times T = constant
- Value 2880 micron K
- Stellar temperature
- Stefan Boltzmann Law
- E = e sigma A T to power 4
- sigma = 5.67 times 10 to power minus 8
- Net loss eσA T1 4 minus T2 4
- Kirchhoff Law
- e lambda over a lambda = E lambda
- Good emitter = Good absorber
- Black body design
- Newton Law of Cooling
- Rate ∝ T minus T0
- Special case of Stefan law
- Small temperature difference
- Wien Displacement Law
- Solar Energy
- Solar Constant
- 1360 W per m squared for Earth
- Inverse square law
- Total power 3.5 times 10 to 17 W
- Greenhouse Effect
- CO2 traps infrared
- Global warming
- Glaciers melting
- Solar Constant
- Black Body
- Perfect absorber a = 1
- Cavity radiator
- Fery black body design
- Emissivity e = 1
- Modes of Heat Transfer
Heat Transfer and Solar Energy — Complete Concept Map
The map in words
- root（（Heat Transfer
- and Solar Energy））
- Modes of Heat Transfer
- Conduction
- Solids only
- Atomic vibrations
- Formula Q equals KA delta T t over d
- K is thermal conductivity
- Copper K equals 400
- Thermocol K equals 0.01
- Convection
- Fluids only
- Bodily molecular movement
- Sea breeze example
- Monsoon currents
- No simple equation
- Radiation
- Electromagnetic waves
- No medium needed
- Speed of light
- All bodies emit above 0 K
- Conduction
- Radiation Laws
- Kirchhoff Law
- Good emitter equals good absorber
- Black body a equals 1
- Fery black body design
- Wien Displacement Law
- Lambda-m times T equals constant
- Constant equals 2.884 x 10 minus 3 mK
- Used for star temperatures
- Stefan-Boltzmann Law
- E equals A e sigma T to 4
- sigma equals 5.672 x 10 minus 8
- Net loss formula T1 minus T2
- Newton Law of Cooling
- Rate proportional to excess T
- Valid for small temperature difference
- Derived from Stefan law
- Kirchhoff Law
- Solar Energy
- Solar Constant
- 1.36 x 10 cubed W per sq m
- Total Earth energy 3.5 x 10 to 17 W
- Inverse square law for planets
- Greenhouse Effect
- CO2 transparent to visible
- CO2 opaque to infrared
- Global Warming threat
- Glaciers melting
- Solar Constant
- Key Quantities
- Emissive Power E
- J per sq m per second
- Max for black body
- Emissivity epsilon
- Ratio E over E-black
- 0 to 1 range
- Absorptive Power a
- Fraction of energy absorbed
- Black body a equals 1
- Emissive Power E
- Modes of Heat Transfer
Heat Transfer and Solar Energy
The map in words
- Heat Transfer and Solar Energy
- Conduction
- Convection
- Radiation
- Wien's Displacement Law
- Stefan-Boltzmann Law
- Black Body
- Solar Energy
- Greenhouse Effect
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Explore DiagramsFrequently Asked Questions
What are the important topics in Heat Transfer and Solar Energy for NIOS Class 12 Physics?
Key topics in Heat Transfer and Solar Energy include Processes of Heat Transfer, Radiation Laws, Solar Energy, Greenhouse Effect and Newton's Law of Cooling. Study these first, then practise questions on each for the NIOS Class 12 board exam.
What do the concept maps for Heat Transfer and Solar Energy show?
The 4 maps show how the ideas in Heat Transfer and Solar Energy connect: Heat Transfer and Solar Energy — Complete Chapter Overview; Heat Transfer and Solar Energy — Chapter Concept Map. Each map is also written out as an outline on this page.
How should I revise Heat Transfer and Solar Energy for the NIOS Class 12 board exam?
Learn the core ideas first, then work through the 45 practice questions on Heat Transfer and Solar Energy. 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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Practice Quiz
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Important Questions
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Revision Notes
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Formula Sheet
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Chapter Summary
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Study Plan
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Flashcards
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Syllabus
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