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electricity - Coggle Diagram

- - - - moving of electrons produce electricity
        
        electricity can flow through it easily
        
        it's called current
        
        current moves in opposite direction from the electrons
        
        electrons move to +
        
        current moves to -
        
        equation is = charge over time
  - - - Coulombs law: F=k((q1q2)/r^2)
      - electrical force need electrical field to propagate
        
        represented as lines with arrows going from - charge to + charge
        
        more lines-bigger power the field has
        
        F=k*(q/r^2)
        
        electrical field does work while moving charge
        
        at some point charge gains energy, and losts it
        
        energy gained/lost per charge called voltage
        
        in other word: how many work the field do per charge to move it
  - - - the amount of charges stored in capacitor is equal to capacitance multiplied by voltage
- - - - different materials have a different ability to "block" an electric field
        
        this called permitivity
        
        we use permittivity of vacuum as thing to compare
        
        relative dielectric constant = permittivity of a material relative to vacuum
        
        permittivity = dielectric constant
  - - - electrons can move more easily
  - - - blocks moving of electrons
- - - - magnetic flux - the number of induction lines in a given unit of space. Equation: Ф = B * Area
      - permeability - the property of magnetizable material which describes the degree in which it modifies the magnetic filed in which it is. The higher permeability - the higher the magnetic field
        
        magnetizable materials are made of tiny magnets(dipoles) which are usually dearranged but under the influence of a magnetic field become arranged and the material become magnet
        
        electromagnet
        
        we take a core material and coil a conductor around it. When we make a current to flow through it - it becomes electromagnet
        
        why coil?
        
        coiling conductor into the shape called solenoid makes it stronger.
        
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        what determines its magnetic field strength?
        
        how many current flows through the coil
        
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        number of turns
        
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        permeability of its core material
        
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        shape and size of the coil
        
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- - - - different material have different resistance. Insulators have high resistance, and conductors have low resistance
        
        it can be calculated with the formula: R = p*(L/A). p = resistivity, L=length, A=cross-sectional area
    - - constant value
      - changeable value
      - variable value