An inverting amplifier with ±11 V supply voltages normally has a 10Vpp sinusoidal output. Checking the circuit with an oscilloscope shows that the output is 0 V. Which of the following could account for this problem?
A) Ri open
B) Rf open
C) Rf shorted by a solder bridge
D) either R1 is open or Rf is shorted

Question

Quizplus · Accepted Answer

An output of 0 V in an inverting amplifier could be caused by either an open input resistor (Ri), which would prevent any signal from reaching the inverting input of the op-amp, or a shorted feedback resistor (Rf), which would effectively ground the output signal, making it 0 V. Both conditions would disrupt the normal operation of the amplifier, leading to a zero output voltage.

An Inverting Amplifier with ±11 V Supply Voltages Normally Has