Op amp Unit-3

An ideal op-amp has

• Infinite differential voltage gain

• Infinite input resistance

• Zero output resistance

• All the above

What is the max output voltage that can be observed on the practical op-amp, if an op-amp is supplied with a voltage of ± 15 V?

• Does not depend on the supply voltage

• Less than 15 V

• Grater than 15 V

• None of the above

Open loop Bandwidth of 741 op amp is

• 5 Hz

• 5 Mhz

• 1 Mhz

• 10 Khz

The output of a particular Op-amp increases 8V in 12μs. The slew rate is

• 90 V/μs

• 0.67 V/μs

• 1.5 V/μs

• None of these

A certain Non inverting amplifier has R1is 1 kΩ and Rf is 100 kΩ. The closed-loop voltage gain is

• 100

• 1000

• 100,000

• 101

A voltage follower

• has a voltage gain of 1

• is Non inverting

• has no feedback resistor

• has all of these

The Op-amp can amplify

• only d.c. signals only

• a.c. signals

• both a.c. and d.c. signals

• Neither d.c. nor a.c. signals

Which concept states that if one input terminal of an op-amp is at zero potential, then the other one also will be at zero potential?

• Virtual short

• Virtual ground

• Zero input current

• None of the above

Determine the output voltage from the following circuit diagram?

• 
• 
• 
• None of the mentioned

What is the output voltage?

• 50v

• 5v

• -5v

• -50v