Physics 7408: Electronics(OPTION) Topical Past Paper Questions

Several telephone conversations need to be transmitted simultaneously between two locations. Describe the process that allows these conversations to be carried by the same optical fibre. In your answer you should explain: • the importance of the sampling rate in the analogue-to-d…

Figure 10 shows a circuit that has an input signal which is a noisy square wave. The circuit is used to remove the noise and switch a motor M on and off. Figure 10 Explain the functions of components A, B and C. For each of these components you should: • explain its role in the c…

Figure 8 shows island A, a fully developed island off the mainland coast. The island is connected to the mainland by a fibre optic cable lying along the seabed and it also has a satellite link. Nobody lives on island B, but it is due to be developed as a major holiday resort over…