Quiz15-2007-102 - a) = iNA = iN .r 2 k Right hand rule...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
a) k r iN iNA ˆ . 2 π µ = = ρ Right hand rule gives the direction of the magnetic dipole moment: Digitals wrap the loop in the direction of the current, extended thumb is in the direction of the magnetic dipole moment. In this case, it is in z direction . b) Torque is the cross product of magnetic dipole moment and magnetic field. i iNB r B o ˆ . sin 2 θ τ = × = ρ ρ ρ ρ Here, ϑ is the angle between the magnetic moment and the magnetic field. Since these are perpendicular to each other (because the moment is in z direction and the field is in y direction), sin ϑ is 1. Torque is in negative x axis direction.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/23/2010 for the course -- -- taught by Professor -- during the Spring '10 term at Bilkent University.

Ask a homework question - tutors are online