Question
A transistor works as an amplifier only when:
/>Solution
A transistor has three regions: the emitter, the base, and the collector, forming two p-n junctions: the emitter-base (EB) junction and the collector-base (CB) junction. The way these junctions are biased determines the operating region of the transistor. For a transistor to function as an amplifier, it needs to operate in the active region . Â In the active region:
- The emitter-base junction is forward biased . This allows a large number of majority carriers from the emitter to flow into the base. Â
- The collector-base junction is reverse biased . This creates a potential barrier that attracts the minority carriers (that have diffused through the base from the emitter) towards the collector, resulting in a collector current that is controlled by the base current.
Given the following SQL query:
SELECT department _ id, COUNT(*) AS employee _ count
FROM employees
GROUP BY department_id
HA...
Which of the following is the most important reason for calculating the sample size correctly in data analysis?
What is the primary benefit of customer segmentation in a data-driven marketing strategy?
Which of the following best explains why sampling is used in data analysis?
Which of the following scenarios best exemplifies the use of semi-structured data in an organization?
Which test is commonly applied in time series analysis to determine whether a series is stationary?
Which of the following methods is most effective in reducing selection bias during the sampling process?
In the finance industry, which application of data analysis is most critical for reducing credit risk?
Which of the following is a key advantage of using box plots over histograms for visualizing data?
In defining KPIs for a marketing campaign, what is the most critical aspect a data analyst should ensure?
Relevant for Exams:
