Hallo

How to calculate the voltage at Node1 in the following circuit diagram?
Looking forward for inputs

 

You can use a voltage divider equation:

V_1 = Vin * R2/(R1 +R2) = 5V * 1kΩ/2kΩ = 2.5V

 

How to calculate at Node 2 and 3

 

Due to the negative feedback action, the voltage at node 2 will be equal to the voltage at node 1. Thus, V1 = V2 = 2.5V this implies the voltage at node 3 must be equal to V3 = V1 * (1 + R3/R4) = 10V.
https://www.allaboutcircuits.com/vi...ifier-configurations-non-inverting-amplifier/

 

Thanks for your answer
i mean to know if the circuit is called Negative Feedback amplifier and please let me know what is the value at Node 2 and 3 if the circuit has positive feedback action