Question

Most commonly used bias in BJT amplifier circuit is

• A. fixed bias
• B. self bias
• C. collector to base bias
• D. collector feedback bias

Hint:

Voltage divider bias = most stable and widely used.

Answer 1

The Correct Option is B

Concept: Biasing stabilizes operating point (Q-point).

Step 1: Fixed bias drawback Poor stability due to temperature variations.

Step 2: Self-bias (voltage divider bias) Uses resistors to stabilize base voltage.

Step 3: Advantage Less dependent on \(\beta\).

Step 4: Widely used Most practical amplifier circuits use self bias.

Step 5: Conclusion \[ \boxed{\text{Self bias}} \]

Final Answer: \[ \boxed{(B)} \]