 #### Advanced Physics Through Inquiry 1 Teacher Guide

(PS-2848) Teacher guide featuring 15 labs designed for Advanced Placement Physics 1.

### DC Circuits

#### Lab Summary

Students use a voltage–current sensor and an AC/DC electronics laboratory to construct simple resistor circuits with resistors in series or in parallel, or both (with at most one parallel loop of resistors), to demonstrate the validity of Kirchhoff's loop rule (conservation of energy), and Kirchhoff’s junction rule (conservation of charge).

#### Theory

Are the total charge and total energy in an electrical circuit conserved? Does the sum of the voltage drops across each circuit component equal zero (conservation of energy); does the sum of currents going into a circuit junction equal the sum of currents going out of the junction (conservation of charge)? Construct simple resistor circuits with resistors in series or in parallel, or both (with at most one parallel loop of resistors), to demonstrate the validity of Kirchhoff's loop rule (conservation of energy), and Kirchhoff’s junction rule (conservation of charge).

#### Method

In the Structured version of this lab activity, students construct a series circuit and a parallel circuit, using one battery and three resistors, ranging in resistance from 4.7 Ω to 33 Ω, and measure the current going through each circuit and the voltage drop across each circuit. They then measure the voltage drop, or change in electrical potential difference, across each element in the series circuit, and the current through each element in the parallel circuit. Using these measurements, students determine the behavior of the current at the junctions, as well as the change in potential across the series components within the circuit. Students analyze their data using Ohm's Law and equivalent resistance, and examine their results for evidence that supports the conservation of electric charge and conservation of energy. Students are expected to demonstrate that Kirchhoff's loop and junction rules are valid for the analysis of DC circuits in series and parallel configurations.

#### PASPORT Voltage-Current Sensor

(PS-2115) Allows students to safely measure voltage and current simultaneously without overloading the sensor. For use with PASPORT Interfaces.

#### AC/DC Electronics Laboratory

(EM-8656) Designed to perform electricity experiments for AC and DC. Can be used as a standalone with a multimeter or with sensors and PASCO software.

D-cell Battery

#### Advanced Physics 1 Expansion Bundle

(PS-2833) Equipment and sensor expansion bundle for performing 7 experiments in the Advanced Physics through Inquiry 1 Teacher Guide.

### Interface Required

This experiment may require software and an interface for data collection.