Suppose the metal rails in Figure P21.14 are now connected on the left so that a complete conducting path (through the bar and the rails) is formed as shown in Figure P21.22.
(a) If we wish to find the induced current through the bar, what closed path should we choose for the application of Faraday’s law?
(b) What is the direction of the flux through the path chosen in part (a)? That is, is the flux upward or downward relative to the plane of the rails?
(c) Is the magnitude of the flux increasing or decreasing with time?
(d) What is the direction of the magnetic field produced by the induced current?
(e) If the resistance of the loop is 1500Ω, what are the magnitude and the direction of the current through the bar?