1. The problem statement, all variables and given/known data What is the effect of using split- rings in a simple d.c motor? A. The direction of rotation of the coil is reversed. B. The current in the coil flow in the same direction C. The current in the coil becomes alternating D. The direction of force on the coil is reversed E The contact with the voltage source is cut off. 2. Relevant equations No equation is involved. 3. The attempt at a solution I have never seen a d.c motor before or a split ring. I don't just know the function of a split ring in a simple d.c motor. I don't know wether anybody has an idea about this.