A conducting bar of length { moves to the right on two frictionless rails as shown in the figure below. A uniform magnetic field directed into the page has a magnitude of 0.330 T. Assume R = 9.20 0 and { = 0.330 m. X X X X X R X X (a.).At.what.constant speed should the bar move to produce an 8.70-mA current in the resistor? m / s i...... (b) What is the direction of the induced current? clockwise counterclockwise O into the page O out of the page (c) At what rate is energy delivered to the resistor? mW (d) Explain the origin of the energy being delivered to the resistor