1. The problem statement, all variables and given/known data An A.C. voltage, V comprises of a fundamental voltage of 100V rms at a frequency of 120Hz, a 3rd harmonic which is 20% of the fundamental, a 5th harmonic which is 10% of the fundamental and at a phase angle of 1.2 radians lagging. i) Write down an expression for the voltage waveform. ii) Sketch the waveforms of the harmonic compnents. iii) Determin the voltage at 20ms. iv) Given an ideal V = 100V rms, what is the percentage error at 20ms 3. The attempt at a solution part i) V = Vrms * sqrt2 = 100* 1.414 = 141.4V at 120Hz 3rd harmonic = 20% of 141.4 = 28.28V at 360Hz 5th harmonic = 10% of 141.4 = 14.14V at 600Hz v = (141.4sin(240∏t)) + (28.3sin(720∏t)) + (14.1sin(1200∏t-1.2)) does this first part look correct?