No credit will be awarded for an answer without showing or explaining how you go

Question

No credit will be awarded for an answer without showing or explaining how you got it. Be sure to draw a picture. 1. What is the force due to the Earth's magnetic field (magnitude 0.00005 T) on a horizontal wire 12 cm long carrying one amp of current? Assume the Earth's magnetic field is perpendicular to the wire. 2. Assume the mass of the wire described in problem 1 is 2 grams. Place another wire parallel to this wire, at a distance of 2 mm below it. How much current must flow in this second wire to lift the first wire? Also, what direction must the current flow in the second wire? 3 Extra Credit: Determine for problem 1 how much power is dissipated by the two-gram wire, if it is made of copper. The density of copper is 9 grams per cubic centimeter. The resistivity ? of copper is 1.7 times 10-8srn.

Explanation / Answer

1)

The force is given by:

F = ILB sin(th)

= 1*0.12*0.00005* sin90

= 6 x 10-6 N

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.