rOmV4 - Op Amp Virtual Earth

Explanation: Operational amplifiers have a very large open loop gain. So if the output is a few volts, the inverting input voltage must be very small (a few microvolts). This voltage is so small, it is called a virtual earth.

The inverting input, labelled "VE" on the simulation below, is a Virtual Earth because the voltage here is approximately zero as long as the amplifier is not saturating or limiting.

Subject Name Level Topic Name Question Heading First Name Last Name Class ID User ID

fff
Home
<<< ppw
Pg Up
<< ppp
Up
< |||

>|< nnn
Down
> nnw
Pg Down
>> lll
End
>>>

Close
Escape
X

Q: qNum of last_q Q ID: Question ID Score: num correct/num attempts Date Done

Submit
Enter
✔

Question Text

image url

Help Link

Add Delete Clone Edit Hardness

Help Text

Debug

You can attempt a question as many times as you like.
If you are logged in, your first attempt, each day, is logged.
To improve your scores, come back on future days, log in and re-do the questions that caused you problems.
If you are logged in, your most recent wrong answers get remembered. This might help you and your teacher to correct your understanding.
In the grade book, you can delete your answers for a topic before re-doing the questions. Avoid deleting unless you intend re-doing the questions very soon.

Hosted at linode.com - London

Please report website problems to Neil