1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Need help understanding Lenz's Law

  1. Jul 27, 2016 #1

    pdf

    User Avatar

    1. The problem statement, all variables and given/known data
    I'm trying to find the direction of the current given certain situations, but do not know how to apply Lenz's Law. Attached a image below-
    10ees9f.jpg

    2. The attempt at a solution

    So I figured out how each situation affects the induced current, and that the magnetic field is to the left. For a), the closing of the switch causes an increased magnetic field. If that's the case, shouldn't the current at resistor R flow to the right? The answer is left.
     
  2. jcsd
  3. Jul 28, 2016 #2

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    You do realise the windings are in opposite directions, yes?
     
  4. Jul 28, 2016 #3

    pdf

    User Avatar

    Oh I missed that- whoops! So that means that the magnetic field for resistor R is going towards the right, therefore resulting in the current going left when the magnetic field is increased and towards the right when decreased?
     
  5. Jul 28, 2016 #4

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    Yes.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Need help understanding Lenz's Law
  1. Help with lenz's law (Replies: 12)

  2. Help with Lenz's law (Replies: 5)

Loading...