Basic Electronics Paper 2, WASSCE (PC 2ND), 2018

Question 5

 

(a) State four properties of an ideal operational amplifier.
(b) Fig. 3 is the circuit diagram of a non-inverting amplifier.

 

Calculate the voltage gain.

The expected responses were:

 

(a)        Properties of an ideal operational amplifier

    • Infinite impedance
    • Infinite open-loop gain
    • Zero input offset voltage
    • Zero output impedance
    • Infinite bandwidth

     

     

    It was reported that majority of the candidates responded well to question 5.