How does using a low-pass filter (single-pole) on the input of a ...

[melina_rosy]

How does using a low-pass filter (single-pole) on the input of a voltage follower makes it an averager?
 
  A) the RC filter is designed to do mathematical averaging
  B) the first time constant of the capacitor is about 63 or average value of the input
  C) the RC filter will pass only the dc component (average value)
  D) none of the above

Question 2

In order to find the square of a voltage value
 
  A) use an op-amp with a linear multiplier in the feedback loop
  B) use a linear multiplier with two inputs tied together
  C) use cascaded voltage followers
  D) any of the above will yield the same result

[Bison]

Answer to Question 1

C

Answer to Question 2

B

[melina_rosy]

Gracias!

[daiying98]

TYSM