Physic help The figure to the right shows an end view of two long, parallel wire

Question

Physic help

The figure to the right shows an end view of two long, parallel wires perpendicular to the xy-plane, each carrying a current 1=5. 00A but in opposite directions. What is the magnitude and direction of the B-field at point P that is produced by the current in the two wires? Suggested Exercises & Problems: Read Chapter 27 Chap. 27: #1, 5, 7, 9, 15, 17, 19, 25, 27, 29, 31, 37, 39, 55, 75, 85 Read Chapter 28 Chap. 28: # 1, 9, 11, 13, 15, 19, 21, 23, 25, 27, 31, 37, 41, 59, 63, 67, 69 Read Chapter 29 Sections 1-6 Chap. 29: 1, 5, 7, 9, 15, 17, 19, 21, 57 Read Chapter 30 Sections 1, 2, 4 Chap 30: 1, 3, 9, 11, 43

Explanation / Answer

given that

the current I=5A

length L=8 cm =0.08 m

distance D=4 cm =0.04 m

this problem belongs to moving charge in magnetisum

if the the wire of finite length L and the point is on its perpendicular bissector at a distance d from the wire

B=2*10^-7*iL/[L^2+4d^2]^1/2

=2*10^-7*5*0.08 / [0.08^2 + 4*(0.04)^2]^1/2

=0.8*10^-7 /[0.0064+0.0064]^1/2

=0.8*10^-7/0.11314

=7.1*10^-7 T

the direction of magnetic field is in Y- direction

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