Hwk7A - . 10-13 i T. What are the speed and direction of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
PHYS 153 Term 2, 2008-09 Homework 7A Mar. 9 - 13 Problem 1 The 10-turn loop of wire shown in the figure below lies in a horizontal plane, parallel to a uniform horizontal magnetic field, and carries a 2 . 0 A current. The loop is free to rotate about a nonmagnetic axle through the center. A 50 g mass hangs from one edge of the loop. What magnetic field strength will prevent the loop from rotating about the axle? Figure 1: fig. for Problem 1 Problem 2 The two insulated wires in the figure below cross at a 30 angle but do not make electrical contact. Each wire carries a 5 . 0 A current. Points 1 and 2 are each 4 . 0 cm from the intersection and equally distant from both wires. What are the magnitude and direction of the magnetic fields at points 1 and 2? Figure 2: fig. for Problem 2 1 - 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Problem 3 A proton is passing through the origin with a velocity v . The magnetic field at the ( x, y, z ) position (1 mm , 0 mm , 0 mm) is 1 . 0 × 10 - 13 ˆ j T. The field at (0 mm , 1 mm , 0 mm) is - 1
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . 10-13 i T. What are the speed and direction of the proton? Problem 4 A wire along the x-axis carries current I in the negative x-direction through the magnetic eld ~ B = B x l k x l elsewhere (1) (a) Draw a graph of B versus x over the interval-3 2 l < x < 3 2 l . (b) Find an expression for the net force ~ F net on the wire. (c) Find an expression for the net torque on the wire about the point x = 0. Problem 5 A nonuniform magnetic eld exerts a net force on a current loop of radius R . The gure below shows a magnetic eld that is diverging from the end of a bar magnet. The magnetic eld at the position of the current loop makes an angle with respect to the vertical. (a) Find an expression for the net magnetic force on the current. (b) Calculate the force if R = 2 . 0 cm, I = 0 . 50 A, B = 200 mT, and = 20 . Figure 3: g. for Problem 5 1 - 2...
View Full Document

This note was uploaded on 02/03/2010 for the course PHYS PHYS 153 taught by Professor Billmcutcheon during the Spring '09 term at The University of British Columbia.

Page1 / 2

Hwk7A - . 10-13 i T. What are the speed and direction of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online