Question

When a transistor in CE configuration, the resistance connected at the collector circuit and base circuit are 10 \( \Omega \) and 8 \( \Omega \) respectively, if the AC current gain \( \beta_{{ac}} = 1.4 \), then the voltage amplification is

• A. 1.5
• B. 1.75
• C. 2.0
• D. 2.25

Hint:

In a CE transistor configuration, the voltage amplification depends on the current gain and the ratio of collector resistance to base resistance.

Answer 1

The Correct Option is B

The voltage amplification \( A_V \) in a CE configuration is given by the formula: \[ A_V = \beta_{{ac}} \times \frac{R_C}{R_B} \] Where: - \( \beta_{{ac}} = 1.4 \) - \( R_C = 10 \, \Omega \) - \( R_B = 8 \, \Omega \) Substitute the values: \[ A_V = 1.4 \times \frac{10}{8} = 1.75 \] Thus, the voltage amplification is 1.75. 
Final Answer: 1.75.