PHY 7B Lecture Notes - Lecture 2: Electromotive Force, Ampere, Electric Potential Energy
Document Summary
From last lecture about fluids we obtained bernoulli"s equation in this form: Another important equation for fluids was the continuity equation. I is constant in a fluid system (the amount of fluid entering the system is the same as the amount of fluid leaving the system): In class, venturi tube demo was shown, and an example/problem was solved with several parts and variables. V is the voltage, electric potential energy (electric energy)/charge and has units of voltage [v]. 1 is the electromotive force= energy/charge, is the voltage of the battery in units of voltage [v]. I is the current in the circuit, electric charge/time, in units of ampere [a]. q is the electric charge and has units of coulombs [c]. The direction of current is opposite of the electron movement. When charges go through resistors they lose energy, Battery raises the potential , increases the charge energy, Voltage drops as current flows through the resistor.
