Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define α in the context of BJTs.
💡 Hint: Think about how you relate collector and emitter currents.
Question 2
Easy
What are the three primary currents in a BJT?
💡 Hint: Remember their definitions as currents entering or leaving certain terminals.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does α in BJTs denote?
- Emitter Current
- Base Current
- Collector Current to Emitter Current Ratio
💡 Hint: Think about the importance of efficiency in electrical devices.
Question 2
True or False: A value of α above 1 indicates a loss in efficiency.
- True
- False
💡 Hint: Consider the maximum value for ratios.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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?
💡 Hint: Remember to calculate the ratio and analyze its relevance to operational requirements.
Question 2
Discuss how increasing the emitter area of a BJT affects α if the collector area remains constant. Analyze both advantages and disadvantages.
💡 Hint: Consider how area affects charge carriers in the context of current flow.
Challenge and get performance evaluation