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Electricity, Batteries, Alternators or dynamos, Photovoltaic solar cells.,…

- - - - Connecting batteries in parallel:
        
        They must be of
        the same voltage. They provide the same energy or
        the same voltage as one battery but for twice as long. The positive
        terminals of the batteries are connected to each other by the same
        conductor, and the negative terminals are also connected by the same
        conductor.
      - Connecting receptors in parallel:
        
        The total resistance of the circuit is the
        result of applying Ohm’s law. The total current must be the sum of all
        divided currents, and the voltage is the same between the two common points.
  - - - Connecting batteries in series:
        
        The energy they
        provide (the voltage) is greater than when using only
        one battery. The positive terminal is connected to
        the negative terminal of the next one. The bulb connected to these two
        batteries gives more light than if it was connected to only one.
      - Connecting receptors in series:
        
        The total resistance of the circuit is the
        result of adding all the resistances connected in the circuit. It is derived
        from the voltage dropping as the sum of all individual voltage drops,
        having the current be constant.
- - - - We call charge to the amount of electricity stored in an object. It is the
        equivalent of volume of water in the container. It is usually represented by
        letter Q and is measured in coulombs [C].
- - - - All matter is made of very small particles called atoms. We don't know exactly how it looks but they exist models that explain us how we imagine them
        to be.
- - - - Generators
        
        A generator provides the energy necessary to move the electrons. It
        produces a continuous electric current. We can distinguish four types of
        generators
- - - - Electrons crash into the atoms of the material they are flowing through.
        Part of the energy that they transport is transformed into heat when they
        crash. This is called the Joule effect. This long thin material has more
        resistance to the flow of the current, so more heat is produced.
    - - There are two ways to produce light with electricity: when the
        temperature increases because of the electric current and when some
        gases react to carrying electricity.
        
        When the increase in temperature is considerable,
        light begins to appear. At first it is red and then it
        becomes white at higher temperatures.
        
        Some gases emit light when they carry an electric
        current. Fluorescent tubes and low-energy bulbs are
        based on this phenomenon.
    - - Motors transform electrical energy into motion. They are based on the
        forces of attraction and repulsion between a magnet and a conductor
        wire placed in one or more loops inside it.
- - - - Radioactive residuals
        
        Acid rain
        
        Depletion of sources
        
        As limited resources, the exploitation of fossil
        fuels is leading to their depletion.
        
        Thermal power plants release sulfur and nitrogen oxides
        into the atmosphere, which, when mixed with rainwater, cause
        severe pollution in nearby forests
        
        Waste from nuclear power plants remains
        highly radioactive for thousands of years, even though it is treated
        and sorted in secure facilities.
      - When fossil fuels are burned to generate
        electricity, carbon dioxide is released into the atmosphere, thereby
        raising the planet's temperature due to the increased greenhouse
        effect.