Discussion
The value of total collector current (Ic) in CB (common base) configuration is :
Answer: B
The total collector current is \(I_{c} = \alpha I_{E} + I_{CO}\).
In the common base configuration a fraction \(\alpha\) of the emitter current crosses the base and reaches the collector. In addition, the reverse-biased collector-base junction passes a small leakage current \(I_{CO}\) (also written \(I_{CBO}\)) of minority carriers, which flows even with the emitter open. The total collector current is the sum of the two.
\(I_{c} = \alpha I_{E}\) leaves out the leakage component, so it is not the total. \(\beta\) is the current gain relating the collector current to the base current in the common emitter configuration, so \(\beta I_{E}\) is wrong, and the first option has the terms and signs mixed up.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development