Current Electricity Exe-9C Long Ans Type Concise Physics ICSE Class 9 selina Publishers Solutions. Answer of Long Questions based on Efficient Uses of Energy. Visit official Website CISCE for detail information about ICSE Board Class-9 current electricity class 9 Physics.
Current Electricity Exe-9C Long Ans Type Concise Physics ICSE Class 9
| Board | ICSE |
| Class | 9 |
| Subject | Physics |
| Writer / Publication | Concise selina Publishers |
| Chapter-9 | Current Electricity |
| Exe-9C | Efficient Uses of Energy |
| Topics | Solution of Long Ans Que. |
| Academic Session | 2024-2025 |
Efficient Uses of Energy
LONG ANSWER TYPE: Current Electricity Exe-9C Long Ans Type Concise Physics ICSE Class 9 selina Publishers Solutions.
Question-1: What is meant by efficient use of energy?
Answer- Energy efficiency is the use of less energy to perform the same task or produce the same result. Energy-efficient homes and buildings use less energy to heat, cool, and run appliances and electronics, and energy-efficient manufacturing facilities use less energy to produce goods.
Question-2: Explain the role of geographical location and architectural features in reducing the artificial lighting inside a building.
Answer- A building’s location and its surrounding play a key role in regulating its temperature and illumination. Proper placement of windows and skylights and the use of architectural features that reflect light into the building can reduce the need of artificial lighting.
Question-3: Give an example to explain that the use of modern eco- friendly technologies is more efficient and less polluting.
Answer- Modern appliances like refrigerators make use of significantly less energy than older appliances and also stopped using Freons as refrigerant which make more efficient and less polluting. Modern refrigerators have high rating . Higher the star rating, higher is the efficiency.
Question-4: Describe three ways for the efficient use of energy.
Answer- Three ways to use energy efficiently:
1. The use of compact fluorescent lights (CFL) saves 67% energy and may last 6 to 10 times longer than the incandescent lamps.
2. The use of advanced boilers and furnaces in industry can save sufficient amount of energy in attaining high temperatures while burning less fuel. Such technologies are more efficient and less polluting.
3. The fuel efficiency in the vehicles can be increased by reducing the weight of the vehicle, using the advanced tyres and computer controlled engines.
Question-5: What social initiatives must be taken for the sensitive use of energy?
Answer- It becomes essential to create awareness amongst the peopel and build in them the trends of sensitive use of the resources and products so as to reduce the use of electricity.
Public awareness can be improved by mass media and childrens participation in campaigns and eco club activities.
Community involvement will surely be effective in reducing the misuse of electricity.
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