Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    Y'all could someone help me with this. I don't know how this experiment would be set up and what this experiment is even trying to ask???

    "A student is asked to investigate how resistance varies with potential difference for a 12V, 24W bulb. Write a plan for an experiment to do this using standard laboratory apparatus and a graphical method"

    Someone pleaaaasee break this down for me.
    •  Official Rep
    Offline

    15
    ReputationRep:
     Official Rep
    Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

    You can also find the Exam Thread list for A-levels here and GCSE here. :dumbells:


    Just quoting in Puddles the Monkey so she can move the thread if needed
    Spoiler:
    Show
    (Original post by Puddles the Monkey)
    x
    • TSR Community Team
    Offline

    21
    ReputationRep:
    TSR Community Team
    (Original post by slaya)
    Y'all could someone help me with this. I don't know how this experiment would be set up and what this experiment is even trying to ask???

    "A student is asked to investigate how resistance varies with potential difference for a 12V, 24W bulb. Write a plan for an experiment to do this using standard laboratory apparatus and a graphical method"

    Someone pleaaaasee break this down for me.
    Hiya! What subject is this for?
    Offline

    0
    ReputationRep:
    I'll try my best to answer this.

    You should start off by drawing the circuit required, here they've asked for a simple set up with a means to know Resistance and voltage, to do so you need to show a circuit with:
    a) Power Supply (12V)
    b) Variable Resistor
    c) A voltmeter connected in PARALLEL with the resistor
    d) An ammeter connected in SERIES with the resistor

    Follow by writing why you've used the voltmeter and ammeter, any reasonable explanation will get you marks such as the voltmeter is accurate to +-0.5 volts and the ammeter is accurate to +-0.5 amps

    Describe how will you carry out the experiment and what kind of data will you collect, state the independent and dependent variable. Now, say that you'll change the length in the variable resistor to get different values for V and I (at least 8-10, with consistent significant figures), for each reading of V and I calculate the resistance by using the formula R= V/I, plot a graph of V against R.

    Comment on precautions such as turn off the circuit after every reading to avoid the resistor being heat up.

    Comment on safety, low risk experiment as the volatage is very small or wear rubber gloves to avoid getting shocked.

    Hope I could help.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brexit voters: Do you stand by your vote?
    Help with your A-levels

    All the essentials

    The adventure begins mug

    Student life: what to expect

    What it's really like going to uni

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Uni match

    Uni match

    Our tool will help you find the perfect course for you

    Study planner

    Create a study plan

    Get your head around what you need to do and when with the study planner tool.

    Study planner

    Resources by subject

    Everything from mind maps to class notes.

    Hands typing

    Degrees without fees

    Discover more about degree-level apprenticeships.

    A student doing homework

    Study tips from A* students

    Students who got top grades in their A-levels share their secrets

    Study help links and info

    Can you help? Study help unanswered threadsRules and posting guidelines

    Sponsored content:

    HEAR

    HEAR

    Find out how a Higher Education Achievement Report can help you prove your achievements.

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.