Question 2 [15 marks] (a) Draw a full wave rectier circuit that uses diodes. and explain clearly how it functions. You will have to draw the input signal, and the output signal to aid your explanation. [6 marks] (b) What is the purpose of capacitors in a rectifying circuit such as the one described above? Draw the output voltage curve, and comment on its advantage in comparison to the one without capacitors. [3 marks] (0) Draw a well labelled common emitter biased npn bipolar junction transistor circuit. and explain its operation. [6 marks]