Results are out! Find what you need...fast. Get quick advice or join the chat
x

Unlock these great extras with your FREE membership

  • One-on-one advice about results day and Clearing
  • Free access to our personal statement wizard
  • Customise TSR to suit how you want to use it

resistance and temperature question

Announcements Posted on
Rate your uni — help us build a league table based on real student views 19-08-2015
  1. Offline

    ReputationRep:
    How would you design an experiment to see the variation of resistance with temperature?
    Thanks
  2. Offline

    ReputationRep:
    (Original post by JenniS)
    How would you design an experiment to see the variation of resistance with temperature?
    Thanks
    Why dont you tell us what you would do and then we'll correct/improve your answer ?
  3. Offline

    ReputationRep:
    (Original post by Ari Ben Canaan)
    Why dont you tell us what you would do and then we'll correct/improve your answer ?
    erm. Connect up a circuit with an ammeter in series and a voltmeter in parallel with a piece of wire. Measure the voltage and current through the wire at a number of different temperatures (not sure how to heat the wire), then calculate the resistance at each temp from your current and voltage measurements. Plot a graph of resistance against temp and look at the relationship?
  4. Offline

    ReputationRep:
    (Original post by JenniS)
    erm. Connect up a circuit with an ammeter in series and a voltmeter in parallel with a piece of wire. Measure the voltage and current through the wire at a number of different temperatures (not sure how to heat the wire), then calculate the resistance at each temp from your current and voltage measurements. Plot a graph of resistance against temp and look at the relationship?
    Alternatively, you could use an ohmmeter connected to a measured length of wire. First measure the resistance at room temperature. Make sure to leave the wire connected for some time so as to allow the reading to stabilise.

    Disconnect the wire and let it cool down. Heat the wire in an oven so as to ensure equal heating. Remove it, measure its temperature with a thermocouple and quickly connect it up to measure the resistance.

    Repeat.
  5. Offline

    ReputationRep:
    thanks but what's a thermocouple?
  6. Offline

    ReputationRep:
    (Original post by JenniS)
    thanks but what's a thermocouple?
    A thermocouple is a highly sensitive thermometer. It has a very low thermal capacity which means it responds to temperature changes VERY quickly.

    Its basically made up of two pieces of completely different metals joined together with a voltmeter.

    http://www.omega.com/prodinfo/thermocouples.html

    Just read the first paragraph.
  7. Offline

    Or take a look at page 8 here for an alternative approach...
    http://physics.slss.ie/resources/dow...xperiments.pdf

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: March 23, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

New on TSR

Rate your uni

Help build a new league table

Poll
How do you read?
Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.