1. Solving Circuits 1. _______________ Circuit: A circuit in which there is ___________ path for electrons to follow. 2. _______________ Circuit: A circuit in which there is _______________________ path for electrons to follow (the circuit has branches). Recall from earlier notes... Series Circuits In a series circuit: 1. Current is the _____________ at all points in the circuit. http://phet.colorado.edu/en/simulation/circuit-construction-kit-ac 2. Voltage across the cell (battery) must equal the _________ of the voltage across all of the loads. 3. The total resistance of the circuit is the _______________ of the resistance of all of the loads. EQUATIONS

2. Parallel Circuits In a parallel circuit since the __________________ can take different ______________: 1. Total current of the circuit can be determined by ______________ the current in each branch. 2. Voltage across the cell is the _______________ as the voltage across each of the _____________. * To solve for resistance in parallel circuits use the Ohm's Law equation* Using Ohm's Law to Solve Circuits Recall the Ohm's Law equations: To solve for V: To solve for I: To solve for R: *If you know any two values (V, I or R) you can use these equations to solve for the third unknown value. EQUATIONS

3. Sample Problem 1- Series Circuit 12 -+ Solve for all missing values: T To Solve for RT, use Ohm’s Law: Sample Problem 2- Parallel Circuit T - + Solve for all missing values: To Solve for RT, use Ohm’s Law: Homework Complete the Solving Series and Parallel Circuits Worksheet