GCSE Physics Revision 'Thermistors'

In this video, we look at thermistors. We start by looking at how the resistance of a thermistor is affected by temperature and then we explore applications of thermistors as thermostats, for example in computers.

This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Physics. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.

Student studying: Gnarlycraig

Baby in incubator Jacoplane

[runderscoreuser]

i find it hard to believe i watched this video at my absolute last resort for my physics test the next day- without even knowing the meaning of current and i came out with one of the top grades for physics in my class TYSM

[Booya]

Hi free science lessons. I've just finished my exams last week and id just like to give a really big THANKS to u for helping me revise with ur vids- they've been a great help!

[abdihaadiige]

16 dislikes from the fans that only got 0.1 voltage

[ellajane]

Your videos are beyond helpful, you have made this hard concept so easy to understand honestly it’s been a huge help so thank you so so much!

[oliviaelliott]

Thanks, I’ve made notes on this so hopefully I can remember it:)

[WintoFilm]

Shawn mate, thanks for the videos. Love you xx

[HS-itmv]

do we need to know about these examples like the incubator and computer? And any examples you do in your videos?

[TheKing-gwex]

Sir I’m struggling with the principle of the voltage decreasing as the temperature rises. At higher temperatures the resistance of the thermistor plummets so therefore less energy is needed to drive a current through the thermistor (I get this part). But doesn’t a lower resistance mean the current through the thermistor should increase? V=IR, so if the value of R rises while the value of I falls, why don’t they cancel each other out?

[eviehooper]

Hiya, do we need to know these examples in detail for the exam? Thanks :)

[mackwindasilva]

is it THERMISTOR OR THER-MISTOR cuz seans version is werid

[lMaxe]

Basically the opposite of filament lamp

[charlesknowles]

can thermistors be used for electric thermometers?

[NinjaCokeGaming]

0:37

doesnt it have a low resistance in dark conditions so there is more PD to light up lamp???

[blzee-bufoo]

Do you have a full video course for the Physics?. Please advise

[cheeseontoastiewoastie]

Why is it that in a filament lamp resistance increases with temperature but in a thermistor resistance decreases with a temperature increase?

[sarahstubs]

How would thermistors be used to turn on a component when it is too cold?

[Melcn]

Quick question where is the link for your revision workbook? @Freesciencelessons

[destined]

Why does the resistance decreases when the temp increases in a themistor? I thought the higher the resistance the more vibrations inside??

[ElectricalStorm]

2:44 me!

(I was born 15 weeks premature)

[sheikhalanasreshat]

CAN I WATCH THESE VIDEOS FOR {IGCSE} TOO?