AP EAMCET · PHYSICS · Semiconductors
The voltage gains of two amplifiers connected in series are 8 and 12.5. If the voltage of the input signal is \(200 \mu \mathrm{~V}\), then the voltage of the output signal is
- A \(50 \mu \mathrm{~V}\)
- B \(20 \mu \mathrm{~V}\)
- C 20 mV
- D 50 mV
Answer & Solution
Correct Answer
(C) 20 mV
Step-by-step Solution
Detailed explanation
\(A_{total} = A_1 \times A_2 = 8 \times 12.5 = 100\) \(V_{out} = A_{total} \times V_{in} = 100 \times 200 \mu \mathrm{~V} = 20000 \mu \mathrm{~V}\) \(V_{out} = 20 \mathrm{mV}\)
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