Voltage drop across a PTC thermistor

fyush20 · Nov 23, 2017

Homework Statement

Exam question page with text on PTC thermistor voltage sensitivity, followed by a graph of resistance in ohms (log scale, 1.0E+03 to 1.0E+09) against temperature in °C from 0 to 300 for applied voltages 1V to 10V, with resistance rising sharply between about 100 and 250 °C.

Homework Equations

I am not sure exactly what this question is asking for, especially in regards to the voltage drop. How would the graph of voltage drop vs Rmax-Rmin be any different to what is already provided?

The Attempt at a Solution

CWatters · Nov 25, 2017

I'm not sure I can solve the whole problem but since you haven't had a better answer...

The existing graph shows Resistance vs Temperature for various voltages. The question asks you for a graph with different axis but I don't think they want voltage drop vs Rmax-Rmin. They want "voltage drop per grain boundary" vs the PTC (calculated over Rmax-Rmin).

ISH97 · Nov 12, 2018

Hi, I have this exact question, did you ever manage to solve the first part of the problem?

Voltage drop across a PTC thermistor

Homework Statement

Homework Equations

The Attempt at a Solution

Discussion

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