2 A metal bar of length 1, mass m, and resistance R, rests on a pair of iron rails. A uniform magnetic field B is directed into the page. A battery, voltage V, is connected across the rails as shown in the figure 1. (a) Immediately after the battery is connected, what is the current flowing through the bar? Figure 1. Problem 2. (b) Immediately after the battery is connected, what is the acceleration (both magnitude and direction) of the metal bar?