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2 D 30587

Section B (Paragraph / Problem type)

(Answer all questions in a paragraph of about half a page to one page,
each correct answer carries a maximum of 5 marks)

13. For the circuit shown find : (i) the output voltage; (ii) the voltage drop across series resistance ;
(iii) the current through zener diode.
+ ‰ = 5 12

॥ I,

120 V 10 kQ

14. Derive the equation to get maximum efficiency of a full wave rectifier

15. In acommon base connection, current amplification factor is 0.9. If the emitter current is 1mA,
determine the value of base current

16. In the circuit shown, find the voltage gain. Given that B = 60 and input resistance Rin =1 kQ.

17. The voltage gain of an amplifier without feed back is 3000. Calculate the voltage gain of the
amplifier if negative voltage feedback is introduced in the circuit.

18. What are binary number systems ? How can you convert binary to decimal ? Give example.
19. Differentiate between RS Flip Flop and JK Flip flop.
(Ceiling - 30)

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