What is this circuit? n why?

[charmcaster.engg]

What is this circuit?

 

[Harald Kapp]

We will not give a concrete answer, we will help you arrive at your own solution.

You've bee given this task, so I'd expect you have been lectured before on this topic. What have you done yourself to identify the circuit?
Hint: What happens to the impedance of C1 when the frequency of V1 changes?

 

[charmcaster.engg]

the impedance of C1 is inversely proportional to the frequency of V1.

 

[Harald Kapp]

the impedance of C1 is inversely proportional to the frequency of V1.

Right, so what are the implications for Vout vs. frequency?

 

[charmcaster.engg]

I can not find it. Can you give more info. about which formula to use? or related web link?

 

[Harald Kapp]

Look up RC filters...