cameroon gce intermediate level electronic systems 2
cameroon gce intermediate level electronic systems 2
1. Power supply
1.1 Identify the type of power supply used in this system. (2 marks)
1.2 Draw the block diagram of the power supply. (3 marks)
1.3 Give the name of the component labeled REG. (2 marks)
1.4 Give one advantage of this type of power supply. (1 mark)
1.5 Name three criteria used to choose a transformer. (3 marks)
1.6 Calculate the transformation ratio m of the transformer used in this system. (2 marks)
1.7 Calculate the full load primary and secondary current. (2 marks)
1.8 Give the role of each of the following components: C1, C2, C3 and C4. (4 marks)
1.9 Use a security margin of 50% to calculate the voltage rating of the capacitor labeled C1. (2 marks)
1.10Choose from the following the standard voltage rating of the capacitor C1: 16V, 25V and 35V. (2 marks)
1.11Choose the reference of the component labeled REG from the datasheet provided in table 1. (2 marks)
(Total = 25 marks)
