Advanced Circuits explore learning gizmo

Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

Advanced Circuits [Note to teachers and students: This Gizmo was designed as a follow up to the Circuits GizmoTM. We recommend doing that activity before tying this one] VOcabulary: circuit breaker, equivalent resistance, fuse, Ohm's law, parallel circuit, series circuit Prior Knowledge Questions (Do these BEFORE using the Gizmo.) What is the mathematical relationship between current, resistance, and voltage? < > What is the equivalent resistance (total resistance) of the 10 Ohm 20 ohm 100 ohm Gizmo Warm-up 2. Series circuit shown at left? < > In the Circuits Gizmo, you leamed how to use Ohm's law: V/R, to determine the current in parallel and series circuits. But how do you find the resistance and current in a complex circuit that has both series and parallel elements? First, review how to find the equivalent resistance of a parallel eircuit_ use the Advanced Circuits Gizmo to construct the parallel circuit shown at right, using a 10-ohm and a 20-ohm resistor. Set the Selected battery voltage to 20 volts Move the Ammeter next to the battem What is the current? < > 10 ohm 20 Oh 2. 3. Based on Ohm's law, what is the equivalent resistance in the circuit? < > You can calculate the equivalent resistance of a parallel circuit using the following equation: Based on this equation, what is the equivalent resistance of the circuit? < >