potential divider การใช้

The simplest circuit for the voltage reference is a resistor potential divider connected between the voltage rails.
The other input of the comparator would be supplied with a reference voltage from a potential divider fed off the + 15 V rail.
This is for part of my homework on potential dividers, I've got so far, but I can't seem to simplify this equation.
The adjustment is performed by constructing a potential divider with its ends between the regulator output and ground, and its centre-tap connected to the'adjust'terminal of the regulator.
The capacitor voltage transformer uses a capacitance potential divider and is used at higher voltages due to a lower cost than an electromagnetic VT . An optical voltage transformer exploits the electrical properties of optical materials.