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関連する概念動画

P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
Sustainable Development01:43

Sustainable Development

As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
Power and Energy01:12

Power and Energy

The power and energy delivered to an element are subjects of great significance in the field of electrical engineering. It is a well-known fact that a 100-watt light bulb emits more light than a 60-watt one. Therefore, power and energy calculations play a crucial role in the analysis of electrical circuits.
Power, defined as the time rate of expending or absorbing energy, is quantified in units called watts (W). The relation between power and energy is mathematically given as
Electrical Energy01:10

Electrical Energy

Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules. The...
Light as Energy01:35

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
Photoelectric Effect02:26

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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関連する実験動画

Updated: Jul 12, 2026

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
14:57

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Published on: January 30, 2019

村の発展のための太陽エネルギー

N L Brown, J W Howe

    Science (New York, N.Y.)
    |February 10, 1978
    PubMed
    まとめ

    ソーラーエネルギー技術は,タンザニアの村に大きな可能性を示しており,ディーゼルとグリッドの電気とのコスト競争力を提供しています. 田舎の電化のためのこれらの有望な発見を検証するために,さらなるテストが推奨されています.

    科学分野:

    • 再生可能エネルギーの再生可能エネルギー
    • エネルギー経済 エネルギー経済学
    • 農村の電気化について

    背景:

    • ナショナル・アカデミー・オブ・サイエンスとタンザニア政府は,タンザニアの村で太陽光発電の有効性を評価するために会合を開いた.
    • 発展途上国における農村の電気化は,経済的および物流上の大きな課題を提示しています.

    研究 の 目的:

    • タンザニアの村で,従来のエネルギー源と比べて5つの太陽光発電技術のコストを比較する.
    • タンザニアの農村の電化のための太陽光発電の経済的実現可能性を評価する.

    主な方法:

    • 5つの太陽光発電技術のコスト分析:ミニ水力発電,風力発電,メタン発電,光電池,フラットプレートソーラーコレクター.
    • 太陽光発電技術のコストとディーゼル発電による電気の価格,および全国電力網の価格の比較.

    主要な成果:

    • 評価された5つの太陽光発電技術はすべて,現在,ディーゼルと費用対効果的に競合できる,または数年以内に実現すると予測されています.
    • 計算されたコストデータは,田舎のタンザニアで太陽光発電の採用に好ましい経済見通しを示唆しています.

    結論:

    • ソーラーエネルギーは,タンザニアの村の電化のための実行可能でますます費用対効果の高いソリューションです.

    さらに関連する動画

    Developing High Performance GaP/Si Heterojunction Solar Cells
    10:31

    Developing High Performance GaP/Si Heterojunction Solar Cells

    Published on: November 16, 2018

    Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
    07:18

    Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

    Published on: October 18, 2017

    関連する実験動画

    Last Updated: Jul 12, 2026

    Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
    14:57

    Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

    Published on: January 30, 2019

    Developing High Performance GaP/Si Heterojunction Solar Cells
    10:31

    Developing High Performance GaP/Si Heterojunction Solar Cells

    Published on: November 16, 2018

    Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
    07:18

    Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

    Published on: October 18, 2017

  • 景気予報は,同様の農村環境で太陽光発電技術のさらなる実用的なテストと導入を正当化しています.