- #1
debwaldy
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Homework Statement
Two very long parallel wires which are 20cm apart ,carry currents of 1.5A and 2.0A respectively, flowing in opposite directions. Calculate the magnetic field strength at following points in plane of two wires
(i) midway between wires
(ii)at a point 10cm from the wire carrying the larger current and 30 cm from the other wire
Homework Equations
I have been using the formula H = I/2*pi*R
The Attempt at a Solution
I think i could do part (i) as I knew that the magnetic field strengths add in the middle so i just plugged into the formula using R=0.1 and got an answer of
5.6 A m^-1
However in part (ii) I am slightly confused.
I have said the following:
H = 1.5/2*pi*.3 + 2.0/2*pi*0.1
Is this equation correct or should i be subtracting one magnetic field strength
from the other.andif so which one?i don't really understand
any help or tips would be v much appreciated thanks