Turn on thread page Beta
    • Thread Starter
    Offline

    11
    ReputationRep:
    In the circuit, the batteries have negligible internal resistance and the voltmneter V has a very high resistance. What would be the reading of the voltmeter?Attachment 727152

    Thank you!
    Posted on the TSR App. Download from Apple or Google Play
    • Study Helper
    Offline

    21
    ReputationRep:
    Study Helper
    (Original post by gannaspanner)
    In the circuit, the batteries have negligible internal resistance and the voltmneter V has a very high resistance. What would be the reading of the voltmeter?Attachment 727152

    Thank you!
    No attachment?
    • Thread Starter
    Offline

    11
    ReputationRep:
    what do you mean?
    the picture is right there
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    20
    ReputationRep:
    attachment not found
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by the bear)
    attachment not found
    Name:  IMG-20180223-WA0039-compressed.jpeg
Views: 7
Size:  55.2 KB
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    20
    ReputationRep:
    the total resistance in the circuit is 60 + {40R/(40 + R)} ohms, where R is the resistance of the voltmeter.

    the voltage drop across the 60 ohm resistor must be 2.5 volts.

    you can find the current flowing through the 60 ohm resistor... then find R
    Offline

    1
    ReputationRep:
    8D(ii) i=(10- 8)/(40+10)=0,04A -> V voltometer = 8 + 0,04*40 = 9,6V
    • Thread Starter
    Offline

    11
    ReputationRep:
    Sorry I meant this one
    Name:  image-38a0c9d4-d425-4cf4-baaf-9eac37c70aa0986616558-compressed.jpg.jpeg
Views: 10
Size:  30.6 KB
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    1
    ReputationRep:
    i=(10- 8)/(40+10)=0,04A -> V voltometer = 8 + 0,04*40 = 9,6V
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 23, 2018

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?

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.