KCC Quizzes AQQ303 about the radius of a circle
1. Quote of the month: "When I die, I want to die like my grandfather who died peacefully in his sleep. Not screaming like all the passengers in his car" - Will Rogers
2. Quiz AQQ304 about finding the radius of a circle
Good luck, and try to be
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August Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Important: Read the blog first . The quiz questions are all based on the content of the blog:
Stay in the loop and win! Read the blog Current Output Driving Industrial Loops , then take our quick five-question quiz for a chance to win a gift card
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New challenge is here! It's AQQ259 related to a tunable or adjustable amplifier:

The above circuit is a tunable or adjustable gain amplifier. The opamp used is
considered as ideal (i.e. infinite open loop gain, infinite input resistance and
zero output impedance).
Questions:
1. For given R1, R2 and P, at which wiper position α, Vout = 0 volt?
2. Versus Vin, what is the dynamic range of Vout?
Good luck! And try to be among the first ones!
P.S. Don't hesitate to spread those weekly quizzes to colleagues or friends (we need more participants)!
I'm a little confused: It seems like this quiz was first released back in April 2024? Has the quiz been running until now (April 2025), or has it been restarted? Maybe I missed it in the first place?!
Looking through the first few answers, in my opinion @retireEE had a very good answer to the quiz, and there are many other really good answers as well.
By the way, did anyone mention that there is also a limit to the Vin voltage range? If the opamp is a rail-to-rail input, NI+ and IN- can be operated in the entire range between -Ecc and +Ecc, but not below or above. This puts a limit on the voltage range Vin can have.
Br Stefan