Electricity (Physics 2)

• Electric Current

  • refers to the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit.
• Electric Current

  Symbol: I (current)

  Unit: A (Ampere)
• Ammeter

  • is a device that measures electric current.
• Direct Current - DC

  • Current flows in one direction only.
• Alternating Current-AC

  • Current flows in one direction, then the other, and alternates back and forth.
  • Is used in one’s home single phase.
• Current

  • Is the flow of electrons through a conductor
  • Measure in Ampere
  • Measured with Amp Meter
• Electron Current flow

  • Negative to positive flow
• Conventional Current flow

  • Positive to negative flow
• Voltage

  • is the pressure from an electrical circuit's power source that pushes the current through a conducting loop, enabling it to do work such as illuminating a light.
• Voltage

  • is the work done on the charges in order for the current to move or flow.
• Voltmeter

  • is a device that measures voltage.
• Resistance

  • refers to the hindrance experienced by charges as they flow through the wires and loads of the circuit.
• Resistance

  • limits the flow of current in an electric circuit in order to ensure that current flows at appropriate levels.
• Resistance

  Symbol: R (resistance)

   Unit: Ω (Ohm)
• Voltage

  Symbol: V (Voltage)

  Unit: V (Volts)
• I is directly proportional to V        

  I is inversely proportional to R

  
  

  
  

  V is directly proportional to I        

  V is inversely proportional to R

  
  

  
  

  R is inversely proportional to I        

  R is inversely proportional to V
• Ohm's Law

  ,

  • It requires one volt to push one amp of current through one ohm of resistance in a DC circuit.
  • It is a proportion that shows how voltage (V), current (I), and resistance (R) are related in a circuit.
• Decibel

  • sound intensity