A1.55-m-long metal bar is pulled to the right at a steady 5.7 m> s perpendicular to a uniform, 0.710-t magnetic field. the bar rides on parallel metal rails connected through a 24.7@ resistor (fig. e29.30), so the apparatus makes a complete circuit. ignore the resistance of the bar and the rails. (a) calculate the magnitude of the emf induced in the circuit. (b) find the direction of the current induced in the circuit by using (i) the magnetic force on the charges in the moving bar; (ii) faraday’s law; (iii) lenz’s law. (c) calculate the current through the resistor.