A student investigates how the physical properties of an NTC (negative temperature coefficient) thermistor change when connected in a circuit. They measure the electrical power dissipated by the component at different currents and plot their results on the grid below.
a.[1]
Draw a curve of best fit on the graph.
b.[2]
Use the graph to describe the relationship between current and power for this component.
c.[1]
Use the graph to estimate the current when the power is 24.0 W24.0\text{ W}24.0 W.
d.[3]
The student thinks that the resistance of the component decreases as the current increases. Use data from the graph to explain if the student is correct.