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The amplifiers A, B and C are connected in series. If the voltage gain of A,B and C are 10, 15 and 20 respectively and input signal 2 mV peak value. Then the output signal voltage’s peak value will be
  • a)
    6 V
  • b)
    5 V
  • c)
    3 V
  • d)
    4 V
Correct answer is option 'A'. Can you explain this answer?
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The amplifiers A, B and C are connected in series. If the voltage gain...



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The amplifiers A, B and C are connected in series. If the voltage gain...
To find the output signal voltage, we need to multiply the input signal by the voltage gains of each amplifier in series.

First, we need to convert the peak value of the input signal to the peak-to-peak value, which is 2 x 2 = 4 mV.

The output voltage of amplifier A would be 10 times the input voltage, so it would be:

10 x 4 mV = 40 mV

The output voltage of amplifier B would be 15 times the input voltage, so it would be:

15 x 40 mV = 600 mV

The output voltage of amplifier C would be 20 times the input voltage, so it would be:

20 x 600 mV = 12 V

Therefore, the output signal voltage is 12 V.
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