A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

a 1.2 m long steel rod moves through a uniform magnetic field of 0.020 T at 20 m/s. What emf is induced between the two ends of the steel rod? A. 0.60 V B. 0.48 V C. 0.36 V D. 0.50 V *will draw inside!

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1434439190034:dw|

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the inner circles are shaded darker :)

  3. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    inside our rod the Lorentz force is acting on the free electrons: |dw:1434439163697:dw|

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok!

  5. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    at the equilibrium thos forces, the lorentz force and the electrostatic force have the same magnitude, so we can write: \[\Large eE = evB\] and then: \[\Large V = vBL\] being L the length of the rod, and V the emf

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok! what do we plug in? :/

  7. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[V = vBL = 20 \times 0.02 \times 1.2 = ...volts\]

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    we get 0.48! so choice B is the solutoin?

  9. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes! that's right!

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yay!thanks!! okay, last one!!:)

  11. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ok! :)

  12. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.