Two vertical parallel rails made of material that is an electrical conductor are \(80.0 \mathrm{~mm}\) apart (Figure P27.29). A wire \(80.0 \mathrm{~mm}\) long is free to slide along the rails, which allow a current to be maintained through the wire as it slides. An external magnetic field of magnitude \(0.250 \mathrm{~T}\) is directed into the page in Figure P27.29. If the mass of the wire is \(4.00 \mathrm{~g}\), what are the current and current direction in the wire if the wire doesn't fall under gravity?

Data from Figure P27.29

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x100x B into page x xx X -free to slide x x 80.0 mm X x