Turn on thread page Beta
    • Thread Starter
    Offline

    4
    ReputationRep:
    Can someone please explain how to do these questions. I'm not very good at circuits.
    Attached Images
         
    Offline

    20
    ReputationRep:
    The oscilloscope is being used as a volt meter.

    for this type of internal resistance question you want to make a couple of measurements

    1. the open circuit potential across the battery - with an open circuit, i.e. no current flow this is equal to the EMF of the battery.

    2. the potential across the battery with a load resistor in circuit. in this situation a current flows through the internal resistance of the battery and therefore there is a potential across the internal resistor pointing in the opposite direction to the current flow.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: September 18, 2017

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19
  • Sheffield Hallam University
    City and Collegiate Campus Undergraduate
    Sun, 3 Feb '19
Poll
Brexit: Given the chance now, would you vote leave or remain?

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.