(a)



(b)



(i) Name the type of a diode whose characteristics are shown in Fig. 14.9 (A) and Fig. 14.9(B).



Fig.14.9(A) is the characteristic of any PN junction diode. The first quadrant represents the forward bias of the diode. P is the point where it reaches the break down voltage. Depending on the value of P we can further classify them to zener or normal PN junction diode.


Fig.14.9(B) is the characteristic of photo electric diode.


(ii) What does the point P in Fig. (A) represent?


P is called the knee or the breakdown voltage. At this point the current vigorously increases.


(iii) What does the points P and Q in Fig. (B) represent?


We can see that at point Q, V = 0. Current is maximum at this point. At point Q current completely vanishes. This voltage at this point is called the stopping potential.


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