PHYS 1B Lecture Notes - Lecture 10: Circuit Diagram, Cell Membrane, Neuron
Document Summary
If the charge on one plate is -1c, that implies that the other plate will have charge. Application in biology: signals are transmitted through neurons electrically. Combinations of capacitors: circuit diagram: simplified representation of an actual circuit. Circuit symbols are used to represent various elements. Lines are used to represent wires: 2 capacitors connected: parallel combination, the wire coming from the positive terminal of the battery has a fork, 2 capacitors connected: series combination. Wire from positive terminal goes to c1, then c2. Parallel combination: the potential difference of each individual capacitor equals each other, the total charge is the sum of the individual charges, you can replace the 2 capacitors with an equivalent capacitor with capacitance c(eq) The equivalent capacitor must store charge q(total) when connected to a battery. The voltage across the equivalent capacitor is the potential difference: c(eq) = c1 + c2, equivalent capacitance is greater than any of the individual capacitances.
