### Electric Circuits

A Concept-Builder is an interactive questioning module that presents learners with carefully crafted questions that target various aspects of a concept. Each Concept Builder focuses the learner's attention upon a discrete learning outcome. Questions target that outcome from a variety of angles using multiple difficulty levels or varying activities. The following Concept Builders target concepts in Electric Circuits.

Light Bulb Anatomy

Learning Goal: To identify the pathway that charge takes through a light bulb and to use that information to make specific bulbs in a circuit light.

Current

Learning Goal: To identify the direction of the current, to compare its value at various locations in a circuit, and to predict the effect of varying number of cells and bulbs upon the current.

Learning Goal: To rank the relative resistance of various wires based on information about the wire length and cross-sectional area.

Learning Goal: To understand the concept of electric potential and to use the concept to predict which bulbs light in a complex circuit and to identify the electric potential value at various locations in a circuit.

I = ∆V/R Equations as a Guide to Thinking

Learning Goal: To use voltage-current-resistance relationship to predict the effect of varying voltage and varying resistance upon the current in a circuit.

Which One Doesn't Belong? - Equivalent Resistance

Learning Goal: To analyze series and parallel circuits to determine their equivalent resistance and to compare its value to that of other circuits.

Series Circuits - ∆V = I•R Calculations

Learning Goal: To use the ∆V = I•R equation to analyze a simple or a series circuit and mathematically relate a battery voltage, a current value, a resistance value, or a potential value.

Parallel Circuits - ∆V = I•R Calculations

Learning Goal: To use the ∆V = I•R equation to analyze a parallel circuit and determine voltage and current values at specific locations.