At the end of this lesson you should be able to:

• apply the formulas that give the reactance values in an ac circuit as a function of (i) capacitance (ii) inductance, and (iii) frequency.
• interpret the meaning of the terms phase angle and power factor.
• given an RLC circuit in which values of the resistance, inductance, capacitance and the characteristics of the genertator are known, calculate (i) the instantaneous and rms voltage drop across each component, (ii) the instantaneous and rms current in the circuit, (iii) the phase angle by which the current lags or leads the voltage, (iv) the power expended in the circuit, and (v) the resonance frequency of the circuit.
• understand and use phasor diagrams for the description and analysis of ac circuits.
• understand and explain how high and low pass filters function.
• understand the manner in which step up and step down transformers are used.