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CHAPTER 29 Magnetic Fields due to Currents
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Your answer is partially correct.
Figure (a) shows two wires, each carrying a current. Wire 1 consists of a circular arc of radius R = 0.015 m and two radial lengths; it carries current $i_1$ = 1.6 A in the direction indicated. Wire 2 is long and straight; it carries a current $i_2$ that can be varied; and it is at distance R/2 from the center of the arc. The net magnetic field $\vec{B}$ due to the two currents is measured at the center of curvature of the arc. Figure (b) is a plot of the component of $\vec{B}$ in the direction perpendicular to the figure as a function of current $i_2$. The horizontal scale is set by $i_{2s}$ = 1.0 A. What is the angle subtended by the arc?
$i_1$
R
$i_2$
R/2
(a)
B
0
$i_{2s}$
$i_2$ (A)
(b)
Number
5.0
Units
rad
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