Practice Emitter Current And Collector Current Ratio (α) (8.7.2) - Revisiting BJT Characteristics (Contd.) - Part A

Practice: Emitter Current and Collector Current Ratio (α)

Lesson 8.7.2Revisiting BJT Characteristics (Contd.) - Part A

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define α in the context of BJTs.
Show hintHide hint
Think about how you relate collector and emitter currents.
Question 2.
What are the three primary currents in a BJT?
Show hintHide hint
Remember their definitions as currents entering or leaving certain terminals.
3Question 3.
What does α in BJTs denote?
- Emitter Current
- Base Current
- Collector Current to Emitter Current Ratio
Show hintHide hint
Think about the importance of efficiency in electrical devices.
4Question 4.
True or False: A value of α above 1 indicates a loss in efficiency.
- True
- False
Show hintHide hint
Consider the maximum value for ratios.
Question 5.
A BJT has an emitter current of 50 mA and a collector current of 45 mA. Calculate α. If the α value of the BJT must remain between 0.95 and 0.99 for optimal operation, is this BJT suitable?
Show hintHide hint
Remember to calculate the ratio and analyze its relevance to operational requirements.
Question 6.
Discuss how increasing the emitter area of a BJT affects α if the collector area remains constant. Analyze both advantages and disadvantages.
Show hintHide hint
Consider how area affects charge carriers in the context of current flow.

4 more questions in this section. Enroll free to practise them all.