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!

What is the magnitude of v?

  1. Mar 7, 2009 #1
    A circuit is pulled with a 16-N force toward the right to maintain a constant speed v. At the instant shown, the loop is partially in and partially out of a uniform magnetic field that is directed into the paper. As the circuit moves, a 6.0-A current flows through a 4.0- resistor.

    What is the magnitude of v?
    (a) 1.5 m/s (c) 6.4 m/s (e) 12 m/s
    (b) 3.0 m/s (d) 9.0 m/s

    the answer is (d) but i don't understand why
  2. jcsd
  3. Mar 7, 2009 #2

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