Recent content by arghphysics

  1. A

    Finding the resistance, magnetic flux, and current of a loop section

    Also, I've been using the wrong time as well. I now have the answer you got. Woof. Thank you again!
  2. A

    Finding the resistance, magnetic flux, and current of a loop section

    I'm beginning to think I don't know how to use this calculator, and how it wants expressions entered into it. I found one error on my part (didn't include r^2 in the top expression), and now my answer is close to what yours is, at i = 3.78 A.
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    Finding the resistance, magnetic flux, and current of a loop section

    Assuming t = 0.577439 is the correct time, I ran the equation again with the correct wire area size and I'm still getting a ridiculous number for i.
  4. A

    Finding the resistance, magnetic flux, and current of a loop section

    It wasn't originally. I converted the area of the wire incorrectly. I simply had 1.2E-3, instead of E-6.
  5. A

    Finding the resistance, magnetic flux, and current of a loop section

    No. I have i(t) = B*r^2*θ'*A / 2ρ(2r+rθ) For θ', I have 12*t, and θ I have 6t^2. I'm not sure why you have angular acceleration *and* time in the equation.
  6. A

    Finding the resistance, magnetic flux, and current of a loop section

    i = ε/R ε = -5.18E-2*t R = 4.8E-12 + 1.44E-11*t^2 t = 0.577439 s That is what I have.
  7. A

    Finding the resistance, magnetic flux, and current of a loop section

    How is that? EMF has an approx magnitude of 1E-2, and R has an approx magnitude of 1E-12. Any value of t I enter in will give me something around 1E-15.
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    Finding the resistance, magnetic flux, and current of a loop section

    Argh.
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    Finding the resistance, magnetic flux, and current of a loop section

    Okay, I found my mistake. I am not used to this new scientific calculator, so it did something I wasn't expecting. The current is now approx 6.0E-15, which sounds more realistic. Thank you so much for your help!
  10. A

    Finding the resistance, magnetic flux, and current of a loop section

    Okay, so I think I went down the wrong track. I got 2 radians for when the current is at a maximum, but when I solved for current I got 6.0E9 Amps which seems a tad high.
  11. A

    Finding the resistance, magnetic flux, and current of a loop section

    No problem. http://i.imgur.com/exBfst7.png
  12. A

    Finding the resistance, magnetic flux, and current of a loop section

    I'm confused about part c) now. Hah. I'm certain I have to take the equation I found for the flux and take the derivative of that to find the induced EMF. But all I have is the angular acceleration for the wire, which is 12 rad/s. So, the double integral of that is 6t^2. I put that into the...
  13. A

    Finding the resistance, magnetic flux, and current of a loop section

    ...based on the angle. Homework Statement Figure 30-78 shows a wire that has been bent into a circular arc of radius r = 24.0 cm, centered at O. A straight wire OP can be rotated about O and makes sliding contact with the arc at P. Another straight wire OQ completes the conducting...