If ground is applied to the (+) terminal of an inverting op-amp, the (-) terminal will_____________?
Correct answer: B. Be virtual ground
- A. Not need an input resistor
- B. Be virtual ground
- C. Have high reverse current
- D. Not invert the signal
Explanation
With the non-inverting terminal grounded and negative feedback present, the virtual-short rule forces the inverting terminal to approximately 0 V as well. It is called a virtual ground because it is not physically connected to ground.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Electronics and Devices
758 free Electronics and Devices MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electronics and Devices questions
The ideal OP-AMP has the following characteristics
How many op-amps are required to implement this equation Vo = V1?
For an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by___________?
A non inverting closed loop op amp circuit generally has a gain factor______________?
The closed-loop voltage gain of an inverting amplifier equal to______________?
Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5kΩ and C1 = 0.05μF___________?