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Electricity, IMG_0577, IMG_0579, ไม่มีชื่อ 16_20241216222111, IMG_0552,…

- - - - Resistors that work with high currents are physically bigger
  - - - The current can only flow in the other direction
        
        Need more than 0.7 Volts across a diode to turn on allowing current to flow
  - - - Gives off light and are often used for indicator lights in electrical equipment
  - - - Emitter
      - Base
        
        The base controls the transistor
      - Collector
    - - Amplifier - Increase the output current
      - Electronic switch - When current enters the base it turns the transistor on
        
        Now current can flow from the collector to the emitter
  - - - Their resistance decreases changes according to light increases
        
        In low light, LDR has high resistance
        
        In bright light, LDR has low resistance
  - - - Their resistance decreases changes according to temperature increases
        
        At low temperatures, thermistors have high resistance
        
        At high temperatures, thermistors have low resistance
  - - - The larger the capacitance the more charge it can store
      - Applications of capacitors
        
        Smoothing AC voltages into steady DC voltages
        
        Filtering electrical noises
        
        Timing applications
        
        Short term electrical memory
  - - - These are tiny circuits attached to a piece of silicon or chip in a plastic package
        
        The circuits inside the package contain hundreds of tiny resistor, diodes, transistors etc.
        
        They are arranged in different configurations for specific purposes
- - - - Red = 2
        
        Orange = 3
        
        Yellow = 4
        
        Green = 5
        
        Blue = 6
        
        Violet = 7
        
        1 more item...
  - - - 1st Figure
    - - 2nd Figure
    - - Number of Zeros
    - - Tolerance
        
        Gold = +-5%
        
        Silver = +-10%
        
        No Band = +-20%
  - - - 1st Figure
    - - 2nd Figure
    - - 3rd Figure
    - - Number of Zeros
    - - Tolerance
        
        Brown = +-1%
        
        Red = +-2%
        
        Green = +-0.5%
        
        Blue = +-0.25%
        
        Violet = +-0.1%
        
        Gray = +-0.05%
        
        Gold = +-5%
        
        Silver = +-10%
        
        No Band = +-20%
- - - - Rt = R1 + R2 + R3 + Rn
      - Also called : Efficient resistance / Total resistance
  - - - 1/Rt = 1/R1 + 1/R2 + 1/R3 + 1/Rn
    - - Rt = R1 + R2 / R1 x R2
- - - - Transform Chemical Energy
    - - Transform Kinetic Energy
    - - Transform Solar Energy