# solve simple problem

Discussion in 'Homework Help' started by devnarayan, Jan 2, 2011.

1. ### devnarayan Thread Starter New Member

Jan 1, 2011
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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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2. ### Wendy Moderator

Mar 24, 2008
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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!

3. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,990
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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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4. ### devnarayan Thread Starter New Member

Jan 1, 2011
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sir why you not directly apply the gain concept since gain of individual network is 1/2 so gain of overall becomes 1/4.

5. ### Jony130 AAC Fanatic!

Feb 17, 2009
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1,115
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