5. What is a fuse and how does it protect a circuit or device to which it is connected? 6. Show using diagrams how using only 2 2 resistors the following resistances can be made: (a) 0.5 2; (b) 1 2; (c) 3 Q; (d) 5 Q. 7. Three wires in a circuit meet in a common point. The currents flowing in two of them are 2 A and 3 A respectively. What are the possible values of the current in the third wire? Explain your answer [drawings would help].

5. What is a fuse and how does it protect a circuit or device to which it is connected? 6. Show using diagrams how using only 2 2 resistors the following resistances can be made: (a) 0.5 2; (b) 1 2; (c) 3 Q; (d) 5 Q. 7. Three wires in a circuit meet in a common point. The currents flowing in two of them are 2 A and 3 A respectively. What are the possible values of the current in the third wire? Explain your answer [drawings would help].