2. Two parallel conducting rails are separated by a distance d and are connected to an ideal battery of voltage V. A constant magnetic eld 1% = Bo]; points out of the page. A conducting bar of mass m and resistance R connects the two rails and completes the circuit. Assume the resistance of the rails is negligible. Due to an externally applied force (in addition to the magnetic force), the bar moves to the left at constant velocity 'vi. (a) What is the induced EMF in the loop formed by the battery, rails, and the bar? Is it directed clockwise or counterclockwise? (b) What is the range of values of 'v for which the externally applied force on the bar is to the right (in the +i direction)? O O O O O O O O O d O O O O OBO O O O Figure 1: (c) Assuming v is in this range, what is the power supplied by the battery