Question

Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 Volt, calculate the output AC signal.

• A. 0 V
• B. 1 V
• C. 2 V
• D. 3 V

Hint:

In a cascaded amplifier system, the total voltage gain is the product of the individual amplifier gains.

Answer 1

The Correct Option is C

The total voltage gain of the cascaded amplifiers is the product of their individual gains: \[ {Total Gain} = 10 \times 20 = 200 \] Now, multiply the input signal by the total gain: \[ {Output signal} = 0.01 \times 200 = 2 \, {V} \] Thus, the output AC signal is 2 V. 
Final Answer: 2 V.