Question

The phenomenon known as "early effect" in a bipolar transistor refers to a reduction of the effective base width caused by

• A. Electron-hole recombination at the base
• B. The reverse biasing of the base-collector junction
• C. The forward biasing of emitter-base junction
• D. The early removal of stored base charge during saturation to cut-off switching

Hint:

In a BJT, the early effect leads to variations in current gain due to the reverse bias of the base-collector junction. Always check for changes in the base width.

Answer 1

The Correct Option is B

The **early effect** in a bipolar junction transistor (BJT) refers to the reduction in the effective base width caused by the reverse biasing of the base-collector junction. As the reverse bias increases, the depletion region widens, effectively narrowing the base, which impacts the transistor's current gain. Thus, the correct answer is option (2).