(Solved):   (a) Compare the I-V characteristic of the Zener diode with that of a standard ("usual") pn ...

 

(a) Compare the I-V characteristic of the Zener diode with that of a standard ("usual") pn junction diode. (b) Consider the BJT circuit below. The p.d. between base and emitter, \( V_{B E}=V_{B E 0}=0.6 \mathrm{~V} \). \( I_{C} \approx I_{E} \) (i) For the values given in the diagram, determine the voltages on the base \( V_{B} \), emitter \( V_{E} \) and collector \( V_{C} \). Hence find the p.d. \( V_{C E} \) between collector and emitter. (ii) If resistance \( R_{B} \) is now doubled, what will be the new p.d. \( V_{C E} \) between collector and emitter? (iii) With the value of \( R_{B} \) in (ii), recalculate the p.d. \( V_{C E} \) between collector and emitter if the transistor is replaced by one with a smaller \( \beta \) of 50 .