1-2-6 POSTLAB QUESTIONS Check your understanding by answering these questions 1. The input stage of a 741 op-amp is a- 2. The output stage ofa 741 op-amp is a 3. The input bias current of an op-amp is the of the two input base currents under no-signal condition. 4. The input -- current is the difference of the two input.base currents. 5. The input voltage is the differential input voltage needed to null or zero the quiescent output voltage.