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2 D 10684
Section B

Answer at least five questions.
Each question carries 5 marks.
All questions can be attended.

Overall Ceiling 25.

13. The circuit uses two zener diodes, each rated 15 V, 200 mA. If the circuit is connected to a 50 Volt
unregulated d.c. supply. Determine

(a) The regulated output voltage.

(b) The value of series resistance R.

~ ۷٦ Output

14. Draw the input and output characteristics of Common Emitter (CE) configuration. What are the
inferences ?

15. For the transistor amplifier shown in figure :

R, = 10 ka
R, =5kQ
८ = 112
Ry = 21.८2
Vpp = 0.7 Volt

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