Discrete capacitors deviate from the ideal capacitor. A band switch selects the input capacitor and inductor. The equivalent thermal circuit consists of a simple capacitor in series with a resistor. Leakage is equivalent to a resistor in parallel with the capacitor. This oxide layer acts as the dielectric in an electrolytic capacitor. This oxide layer serves as the dielectric in an electrolytic capacitor. The effect of a capacitor is known as capacitance. This consists of a capacitor in series with a resistor. In 1957 H. Becker developed a "Low voltage electrolytic capacitor with porous carbon electrodes". This oxide layer acts as the dielectric of the capacitor. I leads the voltage E in a capacitor C. Some instruments use a linear variable differential capacitor. The electrical charge stored in the capacitor is measured in coulombs. The power output is taken across the 1.6 nanofarad capacitor. Opposite the switch is a PCB with the capacitor pads.