solve simple problem

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devnarayan

Joined Jan 1, 2011
8
in given fig. each network have voltage gain 1/2 then voltage gain of cascaded is (a)1/4 (b) 1/5 (c)1/6 (d)1 select correct option. answer provided is 1/5 ,any one can explain how 1/5 is correct
 

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Wendy

Joined Mar 24, 2008
22,237
You'll get a better response in the Homework Forum. I suspect you are new to the board, since you could have modified the other post you made.

Welcome to AAC!
 

Jony130

Joined Feb 17, 2009
5,213
Simply find voltage across R4 resistor in this circuit.



And if you find this voltage you will know that
VR4 = 1/5 * 1V = 0.2V
 

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Jony130

Joined Feb 17, 2009
5,213
No, the gain is equal 1/5 because the load effect.
Second network load the first, and that is why the gain is drop to 1/5.
The output voltage of a first network will be 2/5
 
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