A) \[\frac{{{A}_{1}}{{A}_{2}}}{{{A}_{3}}}\]
B) \[\frac{{{A}_{1}}{{A}_{3}}}{{{A}_{2}}}\]
C) \[{{A}_{1}}{{A}_{2}}{{A}_{3}}\]
D) \[{{A}_{1}}+{{A}_{2}}+{{A}_{3}}\]
Correct Answer: C
Solution :
Output of one is the input for the next. So, the net amplification \[=\frac{\text{Output}\,\text{Final}}{\text{Original}\,\text{Input}}={{A}_{1}}\times {{A}_{2}}\times {{A}_{3}}\]
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