Saved Bookmarks
| 1. |
Consider a box with three terminals on top of it as shown in Fig. Three components namely, two germanium diode and one resistor are connected across these three terminals in some arrangment. A student performs an experiment in which any two of these three terminals are connected in the circuit shown in Fig. The student obtains graph of current-voltage characteristics for unknown comdination of components between the two terminals connected in the circuit. The graph are Form these graph of current-voltage characteristic shown in Fig. to (h), determine the arrangment of components between A, B and C. |
|
Answer» Solution : In V-I graph of condition (i), a reverse characteristics is shown in Fig. Here A is CONNECTED to n-side of p-n JUNCTION I and B is connected to p-side of p-n junction I with a resistance in series. In V-I graph of condition (II), a forward characteristic is shown in Fig. , where 0.7 V is the knee voltage of p-n junction and `1//"slope"=(1//1000)Omega`. It means A is connected to n-side of p-n junction I and B is connected to p-side of p-n junction I and resistance R is in series of p-n junction I between A and B. In V-I graph of condition (iii), a forward characteristics is shown in Fig., where 0.7 V is the knee voltage. In this case p-side of p-n junction-II is connected to C and n-side of p-n junction II to B. In V-I graph of condition (iv), (v) and (VI) also concludes the above connecttions of p-n junction I and II along with a resistance R. Thus, the ARRANGEMENT of p-n I, p-n II and resistance R between A, B and C will be as shown in Fig . 
|
|