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.

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2 V

20 V

10 V

100 V

answer is A.

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Detailed Solution

$In a cascaded amplifier total gain is, A = A_{1} \times A_{2} = 10 \times 20 = 200 . If input is 0.01 volt final output will be 200 \times 0.01 = 2 volt$

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