The correct answer is: B. Is sensitive to changes in Ã
The base resistor method of transistor biasing is a simple and effective way to set the operating point of a transistor. However, it is sensitive to changes in the transistor’s beta (Ã) value. à is a measure of the transistor’s current gain, and it can vary significantly from one transistor to another. This means that the operating point of the transistor can drift if the à value changes.
To minimize the effect of changes in Ã, it is important to use a high value for the base resistor. This will help to stabilize the operating point of the transistor.
Option A is incorrect because the base resistor method of transistor biasing is actually quite simple.
Option C is incorrect because the base resistor method of transistor biasing does not provide high stability.
Option D is incorrect because the base resistor method of transistor biasing does have a disadvantage, which is that it is sensitive to changes in Ã.