1. In which amplifier the output voltage is equal to the negative sum of all the inputs?
A. Averaging amplifier
B. Summing amplifier
C. Scaling amplifier
D. All of the mentioned
2. Determine the expression of output voltage for inverting summing amplifier consisting of four internal resistors? (Assume the value of internal resistors to be equal)
A. Vo = -(Rf/R )×(Va +Vb+Vc+Vd)
B. Vo = (RF/R)×(Va +Vb+Vc+Vd)
C. Vo = (R/ RF)×(Va +Vb+Vc+Vd)
D. None of the mentioned
3. An inverting amplifier with gain 1 has different input voltage: 1.2v,3.2v, and 4.2v. Find the output voltage?
A. 4.2v
B. 8.6v
C. -4.2v
D. -8.6v
4. In which type of amplifier, the input voltage is amplified by a scaling factor
A. Summing amplifier
B. Averaging amplifier
C. Weighted amplifier
D. Differential amplifier
5. An inverting scaling amplifier has three input voltages Va, Vb and Vc. Find it output voltage?
A. VO= – {[(RF/Ra)×Va] +[(RF/Rb)×Vb]+[(RF/Rc)×Vc]}
B. VO= – [(RF/Ra)+(RF/Rb)+(RF/Rc)]×[( Va +Vb+Vc)].
C. VO = – {[(Ra/RF)×Va] +[(Rb/RF)×Vb]+[(Rc/RF)×Vc]}
D. None of the mentioned
6. An amplifier in which the output voltage is equal to an average input voltage?
A. Summing amplifier
B. Weighting amplifier
C. Scaling amplifier
D. Averaging amplifier
7. Find out the gain value by which each input of the averaging amplifier is amplified? ( Assume there are four inputs)
A. 0.5
B. 0.25
C. 1
D. 2
8. 3v, 5v, and 7v are the three input voltages applied to the inverting input terminal of the averaging amplifier. Determine the output voltage?
A. -5v
B. -10v
C. -15v
D. -20v
9. The following circuit represents an inverting scaling amplifier. Compute the value of RoM and VO?
A. VO = -0.985v ; RoM = 111.11Ω
B. VO = -2.567v ; RoM = 447.89Ω
C. VO = -1.569v ; RoM = 212.33Ω
D. VO = -1.036v ; RoM = 320.56Ω
10. Which type of amplifier has output voltage equal to the average of all input voltages?
A. Inverting averaging amplifier
B. Non-inverting averaging amplifier
C. Non-inverting summing amplifier
D. Inverting scaling amplifier
In a non-inverting averaging amplifier, the non-inverting input voltage is the average of all inputs, with a positive sign.