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# A piece of insulated wire is shaped into a figure 8 as shown in Figure $\mathrm{P} 31.19$ . The radius of the upper circle is 5.00 $\mathrm{cm}$ and that of the lower circle is $9.00 \mathrm{cm} .$ The wire has a uniform resistance per unit length of 3.00$\Omega / \mathrm{m}$ . A uniform magnetic field is applied perpendicular to the plane of the two circles, in the direction shown. The magnetic field is increasing at a constant rate of 2.00 $\mathrm{T} / \mathrm{s}$ . Find the magnitude and direction of the induced current in the wire.

## 13.33 $\mathrm{mA}$ This will be clockwise in the upper loop and counterclockwise in the lower loop

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Georgia State University