For voltage sensing, we use a resistor divider and then we always feed that value of the resistor divider to an op amp-amp and then thatthe op amp-amp output is fed to a micro controllermicrocontroller.
What exactly does the op amp-amp do in this case? Why we can't we feed the output of the divider directly to the ADC of micro controllera microcontroller? What difference the does op amp-amp make here?