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18 solved questions on Physics
CSS 2026General Science & AbilityQ. 3
(a) Explain the key phases of Disaster Risk Management: mitigation, preparedness, response, and recovery. (b) Describe the physical factors that trigger Avalanches in mountainous regions. Name the modern technologies used in avalanche prediction and monitoring. (c) Discuss the structural diversity of lipids. Evaluate how variations in fatty acid composition influence membrane fluidity and cell signalling mechanisms. (d) Describe the process of solar photovoltaic energy conversion. How do factors such as irradiance, panel orientation, and temperature influence solar power output?
#cssnexus #Disaster Risk Management #Disaster Management Phases #Avalanche Triggers
CSS Nexus6 Nov 2026
CSS 2026General Science & AbilityQ. 5
(a) Describe the working principle of cellular networks. How do mobile devices maintain connectivity while moving between cells? (b) Using the photoelectric effect, explain the particle nature of electromagnetic radiation. How did experimental observations challenge Classical Wave Theory and lead to the development of quantum mechanics? (c) List the major social media platforms used for business and communication. How do they contribute to digital marketing? Explain. (d) Explain how the GPS system determines the position of a receiver using satellites.
#cssnexus #Cellular Networks #Handover #Photoelectric Effect
CSS Nexus6 Nov 2026
CSS 2025General Science & AbilityQ. 2
(a) What effects are produced due to Rotation & Revolution of Earth? Explain briefly. (b) Describe Electromagnetic Radiations. Give its types and explain their applications. (c) What are Hurricanes? How they are formed and what level of damage they can produce? (d) Explain the advantages and disadvantages of nitrogen containing fertilizers and insecticides.
#cssnexus #Rotation of Earth #Revolution of Earth #Electromagnetic Spectrum
CSS Nexus6 Nov 2026
CSS 2025General Science & AbilityQ. 5
(a) Differentiate between food contaminants and food adulterants. (b) Enlist major food groups based on nutrients, their functions and sources. (c) What is Artificial Intelligence and how does it differ from traditional programming? Describe the main branches of Artificial Intelligence. (d) What are the advantages of optical fibers in communication system? Draw basic structure of optical fiber and explain propagation of light through it.
#cssnexus #Food Contaminants #Food Adulterants #Food Groups
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 2
(a) What is the Tuberculosis and Hepatitis? Explain briefly. (b) Explain the mechanism of Fiber Optic Cable for signal. Explain its construction. (c) Explain the difference between Middle Latitude Cyclones and Tornadoes. (d) What is difference between the Ionic and Covalent bonding? Give examples.
#cssnexus #Tuberculosis #Hepatitis #Fiber Optic Cable
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 3
(a) What is difference between Plastics and Elastics? Explain briefly. (b) What is role of Remote sensing and GIS in environmental Science? Discuss briefly. (c) What are Kepler laws related to the motion of planets? (d) What is difference between preservatives and antioxidants? Discuss briefly with examples.
#cssnexus #Plastics and Elastomers #Remote Sensing #GIS
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 4
(a) What is role of Carbohydrates and Vitamins in the body? Discuss briefly. (b) Discuss the functioning of Liver and Pancreas. (c) What are the standards of drinking water? How Heavy Metals in the water affect the living organisms? (d) What is radioactivity? Discuss the laws of radioactivity. Name two radioactive elements.
#cssnexus #Role of Carbohydrates #Role of Vitamins #Liver Functions
CSS Nexus6 Nov 2026
CSS 2024General Science & AbilityQ. 5
(a) What are the Plant nutrition elements? Enumerate them. (b) What is difference between software and hardware? Give five examples of each. (c) What are the types of earthquake waves? Discuss them. (d) What are longitudinal waves, electromagnetic and Gamma radiations? Discuss them.
#cssnexus #Plant Nutrients #Essential Elements for Plants #Macronutrients and Micronutrients
CSS Nexus6 Nov 2026
CSS 2023General Science & AbilityQ. 2
(a) Define ceramic and nano-ceramic materials. Why the nano-ceramics show better properties than their ceramic counterparts? Write the applications of ceramic materials. (b) What is 'Black Hole'? How black holes are formed and discovered? (c) Write two applications of each of the following electromagnetic radiations: (i) Ultraviolet (ii) Infra-red (iii) Microwaves (iv) Radio waves (v) X-rays. (d) What is Wildfire? Explain its types, causes, spread and preventions.
#cssnexus #Ceramics #Nano Ceramics #Black Hole
CSS Nexus6 Nov 2026
CSS Special 2023General Science & AbilityQ. 2
(A) The age of the Universe is estimated to be 13.8 billion years. How was it estimated? (B) Explain the phenomenon of Solar Eclipse. (C) Describe the James Webb Space Telescope, its principles of operation, construction and importance. (D) Explain the Global Positioning System and its applications.
#cssnexus #Age of the Universe #Cosmic Microwave Background #Solar Eclipse
CSS Nexus6 Nov 2026
CSS Special 2023General Science & AbilityQ. 4
(A) Write a note on data storage in a 'USB'. How is it different from the Hard disk? (B) Describe how a 'Solar Cell' converts light into electricity. Describe its construction, operation, and applications. (C) Write a comprehensive note on the 'Food cycle in our body'. (D) What is 'Artificial Intelligence'? How is it helpful for humanity?
#cssnexus #USB Flash Drive #Flash Memory #USB and Hard Disk
CSS Nexus6 Nov 2026
CSS 2022General Science & AbilityQ. 4
(a) Define the term Water Pollution. What indicators are used to measure the quality of water? Write down the drinking water quality standards. (b) What do you understand by the term Population Planning? Point out the different benefits of Population Planning. (c) Discuss the possible negative effects that Pakistan may face due to Global Warming and Climate Change. What steps may be helpful to control the climatic change? (d) What is Radioactivity? Differentiate between natural and artificial radioactivity.
#cssnexus #Water Pollution #Water Quality Indicators #Drinking Water Standards
CSS Nexus6 Nov 2026
CSS 2021General Science & AbilityQ. 2
(a) Differentiate between a star and a planet. What is the magnitude of a star and how the color of stars is correlated with their temperatures? (b) 'Semiconductors are the Brains of Modern Electronics'. Explain in detail what this quotation means. (c) Briefly describe the most popular and accepted theory about the origin of the Universe. (d) What are the advantages and limitations of renewable energy resources? Briefly explain the prospects of non-conventional energy resources in Pakistan.
#cssnexus #Star and Planet #Magnitude of a Star #Colour of Stars
CSS Nexus6 Nov 2026
CSS 2020General Science & AbilityQ. 4
(a) Briefly describe the various segments of atmosphere. How these segments are maintaining the Earth Radiation Balance? (b) How the organic particulate matter enters in the atmosphere. Also describe the sources? (c) What is natural radioactivity? How it is different from the artificial radioactivity? (d) What are the Fossils? Discuss the importance of paleontology.
#cssnexus #Layers of Atmosphere #Earth Radiation Balance #Organic Particulate Matter
CSS Nexus6 Nov 2026
CSS 2019General Science & AbilityQ. 4
(a) What is the importance of forests in the economy of a country? (b) Give a brief account of biotechnology. (c) Do the mammals always lay eggs? If yes, where in the world do they live? Write the name some of them. (d) How can the sun have such a strong gravitational field if it's made of gases?
#cssnexus #Importance of Forests #Forests and Economy #Biotechnology
CSS Nexus6 Nov 2026
CSS 2018General Science & AbilityQ. 2
(A) Describe different methods to estimate the age of the Universe. (B) Explain the formation of Lunar Eclipse. (C) Explain the terms Dark Energy and Dark Matter. (D) Define the term Black Hole. What's expected inside it?
#cssnexus #Age of the Universe #Hubble Constant #Cosmic Microwave Background
CSS Nexus6 Nov 2026
CSS 2017General Science & AbilityQ. 4
(A) What is a mirage? Describe in detail the creation of mirage. (B) Differentiate between the occurrence of Lunar and Solar Eclipse? (C) Briefly explain what effects are produced due to Rotation & Revolution of Earth? (D) Most of the household appliances utilize 'DC' then why we generate 'AC' at power stations?
#cssnexus #Mirage #Refraction of Light #Total Internal Reflection
CSS Nexus6 Nov 2026
CSS 2016General Science & AbilityQ. 8
(a) Explain the shape of water molecule with the help of Molecular Orbital Theory, also draw its orbital diagram. (b) What are the gamma rays? Explain their applications.
#cssnexus #Molecular Orbital Theory #Water Molecule #Gamma Rays
CSS Nexus6 Nov 2026