Analysis
Yet another puzzle with the same math theme: The straight line and its slope . However, this time the technician is working
with a graphic that provides slopes that are the inverse of the way high school
typically presents that information.
This is not an uncommon situation, so it is important that when dealing with
slopes students have an understanding of what the slope is saying and what the
inverse of the slope is saying. In this puzzle, high resistance (impedance)
means more heat. The resistance is determined by Voltage/Current calculations. The graphic presents the results from
Current/Voltage calculations. Thus, high
magnitude values for slopes on the I/V plots below classify wires with low
resistance. This means that if the same
voltage is applied across Heating Element HE-5-1 and Heating Element HE5-2, filament
HE5-1 will give off less heat. This is not
the optimal selection if you want the most heat possible from the filament
selection.
Question: The
technician should select heating element HE5-1. YES or NO
Answer: NO
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