# Activities

• • • ##### Subject Area

• Science: Physical Science: Electricity

• ##### Author 6-8

45 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™ Apps for iPad®
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.2

DC Circuits

#### Activity Overview

In this lesson, students explore an animation of particle flow in a battery.

#### Objectives

• Students will explore an animation of particle flow in a battery.
• Students will vary the electron flow in a DC circuit with a battery of varying voltages and one, two, and three resistors.
• Students will observe changes in current (milliamps) with varying voltage and resistance.
• Students will describe a direct current both qualitatively and quantitatively.
• Students will use the formula Voltage = Current + Resistance (V=IR).

#### Vocabulary

• Current
• DC Circuit
• Battery
• Resistance
• Amps and milliamps
• Resistors
• Ohms
• Voltage
• Volts

#### About the Lesson

In this lesson, students will address the fact that a direct current flowing in a conductor is directly proportional to the potential difference between its ends (V=I•R, where V is the potential difference, or voltage, I is the current, and R is the resistance of the conductor).

As a result, students will:

• Explore the simulation of a DC Circuit.
• Develop the relationship V=I•R with a simulated DC Circuit.
• Calculate voltage, resistance, or current of several DC Circuits.
• Explore the formula beyond the simulation and use the simulation to verify.
• Discuss the rate and direction of the flow of electrons in the DC Circuit.