A fourth grader decides she is going to make an electromagnetfor her science fair project. She uses an iron nail, 50.cm of #22copper wire and one D cell battery. The battery soon becomes so hotit burns her hand. She asks you why? You explain it is due to theinternal resistance of the battery.
Objectives:
To design an experiment (do not test the plan) to measure theinternal resistance of the battery in the fourth grader'selectromagnet.
To plan and communicate an original experimental design.
To demonstrate a working knowledge of measurement techniques,ohm's law and energy dissipation in a DC circuit.
Materials:
None required
Investigate
Read through the entire lesson first. You are not to preform anyhands-on experimentation in this assignment.
Design an original experiment that will measure the internalresistance of a D cell battery in the situation described.
Place a detailed description of your experimental design in theclass Lab Data Wiki. Make sure you include:
A purpose
A detailed procedure
An equipment list
A safety statement
What data you will collect
What graphs/equations you will employ
What calculations you will make to achieve the statedpurpose
