Register to reply

Current carrying wire in uniform magnetic field; where is net magnetic field 0?

by mm2424
Tags: carrying, current, field, magnetic, uniform, wire
Share this thread:
mm2424
#1
Mar17-12, 06:05 PM
P: 44
1. The problem statement, all variables and given/known data

A long wire carrying 100 A is perpendicular to the magnetic field lines of a uniform magnetic field of magnitude 5.0 mT. At what distance from the wire is the net magnetic field equal to zero?


2. Relevant equations
B = iμo/2∏R


3. The attempt at a solution

I reasoned that in order for the net magnetic field at some point outside the wire to be 0, the magnetic field from the current in the wire must cancel out the uniform magnetic field (B = 5.0 mT).

So, I used B = iμo/2∏R

B = 5.0 x 10^-3 T = 100Aμo/2∏R

R = 4 mm

Is this reasoning sound?
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
Phys.Org News Partner Science news on Phys.org
'Office life' of bacteria may be their weak spot
Lunar explorers will walk at higher speeds than thought
Philips introduces BlueTouch, PulseRelief control for pain relief
Redbelly98
#2
Mar18-12, 08:00 AM
Mentor
Redbelly98's Avatar
P: 12,074
Looks good


Register to reply

Related Discussions
Magnetic Field of a Straight Current-Carrying Wire Introductory Physics Homework 8
IGCSE: Wire carrying a current in a magnetic field Introductory Physics Homework 2
Torque of a current carrying wire in magnetic field Introductory Physics Homework 3
Infinite wire carrying current, magnetic field Introductory Physics Homework 10
Magnetic Field of current carrying straight wire Advanced Physics Homework 3