This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: rosen (arr956) – Homework 08 – Chiu – (58295) 1 This printout should have 15 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A 3 m long wire weighing 0 . 087 N / m is sus pended directly above an infinitely straight wire. The top wire carries a current of 14 A and the bottom wire carries a current of 93 A . The permeablity of free space is 1 . 25664 × 10 6 N / A 2 . Find the distance of separation between the wires so that the top wire will be held in place by magnetic repulsion. Answer in units of mm. 002 10.0 points A rectangular loop with dimensions (hori zontal = 0 . 4 m) × (vertical= 0 . 92 m), is sus pended by a string, and the lower horizontal section of the loop is immersed in a magnetic field. If a current of 5 . 1 A is maintained in the loop, what is the magnitude of the magnetic field required to produce a tension of 0 . 054 N in the supporting string? Assume: Gravita tional force is negligible. Answer in units of T. 003 (part 1 of 2) 10.0 points Consider a current in the long, straight wire which lies in the plane of the rectangular loop, that also carries a current, as shown. 16 cm 6 . 5 cm 72cm ← 5 . 2A 12A → x y Find the magnitude of the net force exerted on the loop by the magnetic field created by the long wire. Answer in units of N. 004 (part 2 of 2) 10.0 points What is the direction of the net force? 1. only a torque, no net force 2. left 3. up 4. right 5. in 6. down 7. no net torque and no net force 8. out 005 (part 1 of 2) 10.0 points A cyclotron designed to accelerate protons of mass 1 . 673 × 10 27 kg to an energy of 3 . 3 MeV has a diameter of 4 . 5 m....
View
Full
Document
This note was uploaded on 11/28/2010 for the course PHY 56705 taught by Professor Turner during the Spring '10 term at University of Texas at Austin.
 Spring '10
 Turner

Click to edit the document details