Question

For V = 5 V, V1 = 1 V, R1 = 500 Q and R2 = 1000, R3 = 500 and RL = 1000 m, find V.. R₃ w R + vt . Rz Vo ZRL I Vi +)

Answer 1

The value of V- will always be equals to V1

1.)

Because in Op amp there will not be any flow of current in its negative as well as positive terminal due to which the potential at its positive terminal becomes V1.

2.)

In op amp there is infinite impedance across it's positive and negative terminal.

Due to which potential across positive and negative must be equal

because when both the terminal has same potential then flow of current will be zero and impedance become infinite which satisfy our criteria

Using 1 and 2 we can say that V- = V1