Question

Two long, straight, parallel wires carry currents that are directed perpendicular to the page as shown in the figure. Wire 1 carries a current I? into the page (in the negative z direction) and passes through the x axis at x = +a. Wire 2 passes through the x axis at x = -2a and carries a current I? in the same direction. If I? = I? = I, what is the net magnetic field produced by both the wires at point x = 2a? A. ??I / 2?a , to the top of the page B. 3??I / 8?a , to the top of the page C. 3??I / 8?a , to the bottom of the page D. 5??I / 8?a , to the top of the page E. 5??I / 8?a , to the bottom of the page

          Two long, straight, parallel wires carry currents that are directed perpendicular to the page as shown in the figure. Wire 1 carries a current I? into the page (in the negative z direction) and passes through the x axis at x = +a. Wire 2 passes through the x axis at x = -2a and carries a current I? in the same direction. If I? = I? = I, what is the net magnetic field produced by both the wires at point x = 2a?

A. ??I / 2?a , to the top of the page
B. 3??I / 8?a , to the top of the page
C. 3??I / 8?a , to the bottom of the page
D. 5??I / 8?a , to the top of the page
E. 5??I / 8?a , to the bottom of the page

Two long, straight, parallel wires carry currents that are directed perpendicular to the page as shown in the figure. Wire 1 carries a current I? into the page (in the negative z direction) and passes through the x axis at x = +a. Wire 2 passes through the x axis at x = -2a and carries a current I? in the same direction. If I? = I? = I, what is the net magnetic field produced by both the wires at point x = 2a?

A. ??I / 2?a , to the top of the page
B. 3??I / 8?a , to the top of the page
C. 3??I / 8?a , to the bottom of the page
D. 5??I / 8?a , to the top of the page
E. 5??I / 8?a , to the bottom of the page

Added by Susan T.

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