Silicon, Circuits, and the Digital Revolution

How Much Power?

Use the Power Line Analyzer to measure the voltage, current, and power when your hairdryer is running, for all possible settings (low, medium, high). Tabulate the data.

1. How does the measured power compare to the manufacturer's stated power? Report the percentage difference in each case.

2. Find a relationship that relates voltage, current, and power.

Comments, suggestions, or requests to ghw@udel.edu. "http://www.physics.udel.edu/~watson/scen103/colloq2000/problems/howmuchpower.html" Last updated Feb. 21, 2000. © George Watson, Univ. of Delaware, 2000.