Test Paper - Electronic Devices and Circuits - Punjab Technical University - Electronics and Communication Engineering - 3rd Semester, Study notes of Electronics engineering

Download Test Paper - Electronic Devices and Circuits - Punjab Technical University - Electronics and Communication Engineering - 3rd Semester and more Study notes Electronics engineering in PDF only on Docsity! Roll No. Total No. of Questions : 091 [Total No. of Pages : 02 Paper ID [A030U (P le r se f i l l t h i s Pape r ID i n ONtR Shce t ) B.Teih. (Sem.- 3'd) ELECTRONIC DEVICES AND CIRCUITS (EC-201) Time: 03 Hours Maximum Marks:60 Instruction to Candidates: 1) Section - A is Compulsory. 2) Attempt any Four questions from Section - B. 3) Attempt any Two questions from Section - C. Section - A Q[) (10 x2 : 20) a) What wilL be the PIV of non-conducting diode if V, is the peak voltage across secondary of the transformer in a haif-wave rectifier? b) What is radiative recombination in LED? c) Which amplifier configuration is most popularly used and why? d) Define photosensitivity of a photo transistor? e) How does MOSFEl 'd i f fer l rom JFET? 0 What happens to the drain curuent of a p-channel JFET when a positive voltage is applied on its gate? g) What are the limitations in selecting operating region in a transistor circuit? h) What do you understand by thermal runaway? r) Why common collector amplifier called emitter fbllower? j) Define n,i * fu^,, E-s80[ t 2081 P.TO.