three identical amplifiers with each one having a voltage gain of 50,input resis

Question

Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1kΩ & output resistance of 250, are cascaded. the open circuit voltage gain of combined amplifier is

Options:

A . 49dB

B . 51dB

C . 98dB

D . 102dB

Answer: Option C

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