Turn on thread page Beta

Power and energy supply to a resistor help please! watch

    • Thread Starter
    Offline

    1
    ReputationRep:
    So part f) for the efficiency would be (59/60) x 100 = 98.3%?
    Offline

    10
    (Original post by adil12)
    Right so for 2) d) I worked out the p.d. lost as 2000V, and then did 120000V - 2000V = 118000 V = 118 kV as the p.d. supplied to the town.

    Then for 2) e) I used Ohm's law and did 118000/500 = 236 ohms, both right?

    And for the efficiency what would it be?
    That looks fine.

    The efficiency I gave you earlier way back in post #13.
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Stonebridge)
    That looks fine.

    The efficiency I gave you earlier way back in post #13.
    So (59/60) x 100 = 98.3%?
    Offline

    10
    (Original post by adil12)
    So (59/60) x 100 = 98.3%?
    That's it.
    The station starts with 60MW and the town gets 59MW because 1MW is lost in the cables.

    Question done.
    You got most of it right without our help. Just a couple of hints needed.

    When you have problems with questions, always show what you have attempted, even if you think it's all wrong.
    If you do, there are plenty of people on here who will be willing to help.
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Stonebridge)
    That's it.
    The station starts with 60MW and the town gets 59MW because 1MW is lost in the cables.

    Question done.
    You got most of it right without our help. Just a couple of hints needed.

    When you have problems with questions, always show what you have attempted, even if you think it's all wrong.
    If you do, there are plenty of people on here who will be willing to help.
    Thanks for the help!

    And right I will in future, thanks for the advice And yes I can see that now, thanks again! Repped
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: September 29, 2010

University open days

  • University of Exeter
    Undergraduate Open Days - Exeter Campus Undergraduate
    Wed, 24 Oct '18
  • University of Bradford
    Faculty of Health Studies Postgraduate
    Wed, 24 Oct '18
  • Northumbria University
    All faculties Undergraduate
    Wed, 24 Oct '18
Poll
Do protests make a difference in political decisions?

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.