Correct Answer - Option 4 : 64.3 KHz
Concept:
Because of Cascading connection, the gain of the amplifier increases, and the Bandwidth of the circuit reduces.
\(\rm Overall \ BW={BW}_n=BW \sqrt{ (2^{\frac {1}{n}}-1)}\)
n is the number of stages (number of amplifiers cascaded)
Given:
n = 2
BW = 100 kHz
Analysis:
\(\rm {BW}_n=100\sqrt {2^{\frac {1}{2}}-1}=64.3\ kHz\)
