There is a fixed value resistor with a resistance of R=2Ω on the left side of the two guide rails separated by L=2 meters. A metal rod ab with a mass of 1kg is placed vertically on the guide rail. The metal rod has a resistance of 1 ohm. On the left side of the metal rod, there is a circular area with an area S = 1 (square meters) between the guide rail and the metal rod. The circular area has The vertical downward uniform magnetic field I, and the magnetic induction intensity is B, the relationship with time is shown in Figure 2. There is a vertical downward uniform magnetic field II on the right side of MN perpendicular to the dotted line of the guide rail, B2 = 1T. At time t=0, a pull force is given to the metal rod to the right. The metal rod enters the magnetic field II at time t=1, and after entering the magnetic field, the velocity v changes with the displacement x in the magnetic field II as shown in Figure 3.
(1) Within 0~1s, the current passing through the metal rod AB
(2) Within 0~1, how much is the amount of electricity through the resistor R and the Joule heating generated by the resistor R
(3) In the process of displacement of the metal rod moving x1=1m in the magnetic field II, how much is the work done by the tensile force F