Can I have brief explaination and answer for True/False question above Please? I

Question

Can I have brief explaination and answer for True/False question above Please?

In an ideal op amp the input currents i+ and i- are Zero amperes. In an ideal op amp the gain , A, is infinite. In an ideal op amp the output resistance, Ro, is infinite. In an ideal op amp when negative feedback is applied and when the op amp is not in saturation, the input voltages v+ and v- are equal . In an ideal op amp the input resistance, Ri , Is Zero ohms. Can I have brief explanation and answer for True/False question above Please?

Explanation / Answer

1. TRUE

In an ideal op-amp the input currents i+ and i- are zero Amps because for an ideal op-amp input resistance is infinite. So, there is virtual open circuit at their input terminals.

2. TRUE

In an ideal op-amp, gain A is infinite. A= Vout/ Vin

There exists virtual short circuit at the input terminals of ideal op-amp. So, Vin=0 and hence, A is infinite

3. FALSE

For an ideal op-amp, output resistance Ro is ZERO.

4. TRUE

In an ideal op-amp, V+ and V- are always equal as there exists virtual short circuit at the input terminals

5. FALSE

In an ideal op-amp input resistance Ri is Infinite

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