(Solved):   Question 4: Diode Circuits [4 Marks] (a) Considering the circuit shown in Figure Qn. 4(a), ...

 

Question 4: Diode Circuits [4 Marks] (a) Considering the circuit shown in Figure Qn. 4(a), i. 11 V1 ii. V1 12 V List the LED (s) that will be ON when powering the circuit with the 12V power source. Justify your answer(s) in (i) above. D1 1N4001 24 Vrms 50 Hz 0Deg 10 2 4 3 1 D1 D2 1N4001 0 D3 ALEDS 24 LED9 D3 1N4001 1N4004 1N4004 2 LED3 RR 3 LED1 AA LED7 7 4 D2 1N4004 D4 D4 1N4004 9 1N4001 D5 1N4001 13 12 Figure Qn. 4(a): Diode Puzzle (b) Given a full-wave rectifier circuit shown in Figure Qn. 4 (b), it is expected that the circuit supply a load that needs a pure DC supply. Though the DC supply is of little ripples (approximately 15% of the supply voltage), and the load resistance is a potentiometer (R?) ranging from 10?? to 100??. Determine the minimum and maximum value of the capacitor (capacitance of the capacitor) (C1) in Farads to clear off the said ripples of the DC before been use for the load. ALED2 4 1 ALED5 4 0 D7 1N4001 cl 50% D1-D7= Silicon signal diode 1 to diode 7 respectively LED1-LED9 = Light emitting diodes v1 = Supply voltage (2 marks) R1 8 Figure Q4 (b): Full-wave rectification with capacitor filtering 5 ALED4 D6 1N4001 6 ALED6 4 (2 Marks) Vo