Describe how complex waveforms are produced from combining two or more sinusodal waveforms.

You have been asked to produce waveforms A and B shown to enable laboratory experiments to be carried out. Unfortunately, you only have dc supplies and three ac sinusoidal voltage supplies available. Describe how these supplies can be utilised to produce an approximation to the waveforms A and B showing formulae and calculations used (assuming 100V and 50Hz for the fundamental waveform).

The pictuere shows double-beam c.r.o. waveform traces. Find the ff:• Amplitude of P• Peak-to-peak value of Q• Periodic time of both waveforms• Frequency of both waveforms• R.m.s. value of P• R.m.s. value of Q• Phase displacement of waveform Q relativeto waveform P