Write the word or phrase that best complete each statement or answer the questio
ID: 2241485 • Letter: W
Question
Write the word or phrase that best complete each statement or answer the question.
As shown in the figure, two long straight wires are separated by a distance of d=0.20 m. The curents are I_1 = 1.0 A to the right in the upper wire and I_2 = 2.0 A to the left in the lower wire. What are the magnitude and direction of the magnetic field at point P, which is a distance d/2 = 0.10 m below the lower wire?
I_1
------------------------>--------------------
d I
I I_2
-----------------------------------<----------
P I d/2
Explanation / Answer
The magnetic field due to i1 is 4*pi*10^-7* 1/ 2*pi*0.3
The magnetic field due to i1 is 4*pi*10^-7* 2/ 2*pi*0.1
Resultant = 2*10^-7 * (3.33-20) = -3.33 * 10^-6 T (out of the plane)
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