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

    5
    ReputationRep:
    if a battery is 5V, would the reading of a voltmeter across the battery be 5V or 0V
    Offline

    5
    ReputationRep:
    Why would it be 0V?
    • Thread Starter
    Offline

    5
    ReputationRep:
    (Original post by StayWoke)
    Why would it be 0V?
    because it's the difference in potential, 12V goes out but 12V goes back in
    Offline

    21
    ReputationRep:
    (Original post by ursbhhdb)
    because it's the difference in potential, 12V goes out but 12V goes back in
    That's not how voltages work. Think of it as a force (i.e. Electro Motive Force). I like the pumbing analagy - the voltage is like the water pressure difference (well, force) and the current is the water flow. The peessure is still there even if there is no flow, as it the case with an ideal voltmeter. The battery is like a pump.
    • Thread Starter
    Offline

    5
    ReputationRep:
    (Original post by RogerOxon)
    That's not how voltages work. Think of it as a force (i.e. Electro Motive Force). I like the pumbing analagy - the voltage is like the water pressure difference (well, force) and the current is the water flow. The peessure is still there even if there is no flow, as it the case with an ideal voltmeter. The battery is like a pump.
    so essentially the voltage would be 5?
    Offline

    21
    ReputationRep:
    (Original post by ursbhhdb)
    so essentially the voltage would be 5?
    Yes. An ideal battery will always generate the same potential difference, regardless of the current that flows.
 
 
 
  • 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
    Did TEF Bronze Award affect your UCAS choices?
    Useful resources

    Study tools

    Rosette

    Essay expert

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

    Thinking about uni already?

    Thinking about uni already?

    See where you can apply with our uni match tool

    Student chat

    Ask a question

    Chat to other GCSE students and get your study questions answered.

    Creating

    Make study resources

    Create all the resources you need to get the grades.

    Planner

    Create your own Study Plan

    Organise all your homework and exams so you never miss another deadline.

    Resources by subject

    From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

    Papers

    Find past papers

    100s of GCSE past papers for all your subjects at your fingertips.

    Help out other students

    Can you help? Study help unanswered threads

    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

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