Sunday, 12 September 2021

Term 3 Week 5-7 A.C. Electricity

 Homework

  • Act 16A, p.265-266 Peak and rms voltage and current
  • Act 16B, p.260 Capacitor Reactance
  • Act 16C, p.275-276 Voltage and Current in a RC circuit
  • Act 16D, p.279 Voltage Current and Impedance in a RC circuit
  • Act 16E, p.282 Inductor Reactance
  • Act 16F, p.286-287 Voltage Current and Impedance in a RL circuit
  • Act 16G, p.289 The LCR series circuit
  • Act 16H, 293-296 Resonance



RCL Phase Relationships





Impedance of a Capacitor Resistor Circuit
Z = √(XC2 + R2)
θ = tan-1(-XC/R) = tan-1(-VC/VR)
The Capacitor Reactance is 90° behind the Resistance
The Capacitor Voltage is 90° behind the Resistor Voltage


Impedance of a Inductor Resistor Circuit
Z = √(XL2 + R2)
θ = tan-1(XL/R) = tan-1(VL/VR)
The Inductor Reactance is 90° ahead of the Resistance
The Inductor Voltage is 90° ahead of the Resistor Voltage


Impedance of a RCL Circuit
Z = √((XL - XC)2+ R2)
θ = tan-1((XL - XC)/R) = tan-1((VL - VC)/VR)

Resonance



A.C. Circuits & Resonance

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