Question

Question 1 • Explain what happens in each branch wrt 11, 12 & 13. Assume the diodes are silicon diodes and have a voltage drop of Si=0.7v AD IVD Question 2 • In each of the circuits below explain why the bulb will light up or not. IA Question 3 • What are the similarities and differences between a diode and a transistor

Answer 1

Each question has been solved.

Detailed solution is given below:

D2. 30V IZ 102 is reverse biased & diode D2 is forward Diode D biased. lo, T 0.71 trenu M 300 - 102 wiaut, From above Iz = OA II = Iz = 30-0.7 = 29.3 A 11 (5+10) oo I1=I2 = 1.953 A Ij = 1,953 A In = OA I3 = 1.953 A

02. switch and the snow that a trancutor operates as a when it is biased to cut off (OFF SWITCH) satovation (ON SWITCH). For the bulb to light wh, the transuctor should the un saturation to work tranuctor sau un saturation, bau- emitter junction should be Fouward biased. • collector - base function should be Forward biased ier VIBE - VB-UE >O. VERSO V CE-VBE DO 2 Now + hou UBE -- ve <0. these reequeried condition is not satisfied This bealb will not light-up. 1

here UREJO but Voe - -ue. so VCE -UBE <o. Thus, bulbe will not light up hure VBE JO. allo UCE TO Thus, bulb will light wp. + huu UBELO so, belle will not light wh. | В Е

are that 03. The similiarity b/w diode and transistors both care constructed veing P and N doked semiconductor material, Both can be used as a switch. The differences b/w diode and transistor ,- • diode has two terminale (anode & cathode) but tranutor has three terminals (Emetter, Base and Collector J. a chode cannot be used for amplification but transitor can be used for amplification diode is formed from PN junction but transistor éé formed back to back connection of diodes