# HW-9 - HW-9 1.Starting from the Lorentz force law, show...

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
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: HW-9 1.Starting from the Lorentz force law, show that the torque on any steady current loop in a uniform magnetic field is Bm. Hint: CBABCACBA)()()(AldrldrA21)(for any constant vector A. 2.In infinite long circular cylinder carries a uniform magnetization Mparallel to its axis. Find the magnetic field Band Hinside and outside the cylinder. 3.A long circular cylinder of radius R carries a magnetization ekrM2, where k is a constant, r is the distance from the axis, and eis the usual azimuthal unit vector. Find the Band Hinside and outside the cylinder. 4.Eletromagnet is usually designed by rapping electro wires over a U shape core made of high permeability (>>1) material (see figure below). If the total length of the core material is Land there are a total of N turns of the wire over the core, what is the magnetic field B within the gap of the U magnet? the gap of the U magnet?...
View Full Document

## This note was uploaded on 02/06/2010 for the course PHYSICS 11 taught by Professor Qiu during the Fall '09 term at University of California, Berkeley.

### Page1 / 2

HW-9 - HW-9 1.Starting from the Lorentz force law, show...

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

View Full Document
Ask a homework question - tutors are online