Rectifiers are essential part of power electronics systems and they constitute the front end of most applications. (a) Define the terms power factor, displacement factor and distortion factor. Explain the differences between the terms. [7 marks] (b) Discuss how a circuit of a single phase rectifier that is capable of exercising control over the input current wave shape is controlled. Support your answer with an appropriate diagram. [8 marks] (c) A simple diode rectifier was tested with an input voltage of 230 V (RMS value). The circuit drew 900 W at an RMS current of 8 A. The meter also registered the fundamental component of the current as 5 A (RMS). Determine the: (1) Apparent power, [2 marks] (ii) Power factor, [2 marks] (iii) Distortion factor; and [3 marks] (iv) Displacement factor. [3 marks] [Total 25 marks]