Determine the range of changes in at = 25℃ for the range 0.2 ≤ ≤ 5 , given that = 0.7 and = 1.2 in NPN transistor.

Determine the range of changes in at = 25℃ for the range 0.2 ≤ ≤ 5 , given that = 0.7 and = 1.2 in NPN transistor.
SFEM 172 : Paper / Vraestel 1 | Assignment / Opdrag 4 | Extended full -time/Verleng voltyds 1 Calculators/Sakrekenaars: Yes Requirements for this paper: Other resources: Answer scripts/ Antwoordskrifte: X Multi -choice cards (A5)/ Multikeusekaarte (A5): Attendance slips (Fill -in paper)/ Presensiestrokies (Invulvraestel): Multi -choice cards (A4)/ Multikeusekaarte (A4): Scrap paper/ Rofwerkpapier: X Graph paper/ Grafiekpapier: Type of Assessment/ Assignment 4: Bipolar Junction Transistors and Applications Qualification/ BSc Module code/ SFEM 172 Module description/ Introduction to Electronics Max/ 25 Examiner(s)/ Ms T A Phori Due Date/ 19/11 /2021 Moderator(s): SFEM 172 : Paper / Vraestel 1 | Assignment / Opdrag 4 | Extended full -time/Verleng voltyds 2 Instructions/ Instruksies 1. Attempt the question s in this paper 2. The paper is worth 25 Marks Question 1 Determine the range of changes in at = 25 ℃ for the range 0.2≤ ≤ 5 , given that = 0.7 and = 1.2 in NPN transistor. [15] Question 2 Determine the following in the circuit below given that = 150 also state whether this circuit with the indicated values operates in the active, saturation or cutoff mode . The base to emitter junction of an NPN transistor is considered to be reverse biased if = = 0. [10] (a) (b) (c) (d) (e)