Recent content by fisixC

Homework Statement A straight rod moves along parallel conducting rails, as shown below. The rails are connected at the left side through a resistor so that the rod and rails form a closed rectangular loop. A uniform field perpendicular to the movement of the rod exists throughout the...

Zero? But if that were the case then why didn't that happen in the earlier problems? Although the current is the same in opposite directions doesn't mean there is no magnetic field...

If you include the cable in the enclosure wouldn't it be equal to the current of the cable, no matter how large it was/

Is it possible to just do the last one as if we were doing the first just substitute the distance for r and the inner cable's magnetic field strength at point p for B?integral(B dot ds) = u_0 * current through?

Success it was correct! Thank you so much, now for the last question.

If you're still with me I got an answer of: 17.1270498 cm *edit* It was wrong... *edit 2* now I have 7.5768170098 cm

That is exactly what I did...where did I go wrong.. I forgot parenthesis around the 0.5*2.92mm part so it was adding the 0.5 to the centimeter measurement.. So for the next part I'd take the value of 1.6uT and multiply that by .1 to get 0.16uT and set that equal to the same equation but...

Can you explain with equations how you got you answer? I must be doing something wrong because if you used the same approach I did, then how did we get two different answers?

Yes I keep getting 27 micro T

I understand that. I do not think this is correct: for one they don't tell me which conductor is going which direction current wise. This makes no sense...I'm not getting the correct answer at all...

I don't believe this is the right approach...

Well I believe your distances are correct because I forgot that it said that the point is from the center of the extension cord. Could it be possible that one is negative and that I need to subtract it from the other? Why would there be a negative magnetic field?

That is incorrect... (4*PI e-7)/(2*PI) * (1.61/((2.4/100) - (0.00292)) + (4*PI e-7)/(2*PI) * (1.61/((2.4/100) + (0.00292)) = 27 micro T

All right then is the way I think of doing the fields correct?

Homework Statement At one instant, the two conductors in a long household extension cord carry equal 1.61 A currents in opposite directions. Find the magnetic field 2.4 cm away from the middle of the straight cord, in the plane of the two wires, if the centers of the two wires are 2.92 mm apart...