What happens when a metal bar is in contact with a pair of metal parallel rails in a magnetic field?
A. A current is induced in the bar, which can generate a magnetic force and potentially cause the bar to move.
B. The bar will heat up due to resistance but will not experience any magnetic effects.
C. The bar will act as an insulator and prevent any electrical current from flowing through the rails.
D. The bar will create a permanent magnet effect in the surrounding area.