Consider a loop of wire with a resistor. In the same plane, (with switch S closed) a long wire has a current I flowing from left to right.
If switch S is closed for a long period of time, and thensuddenly opened, what is the direction of the induced current through R as the current I rapidly decreases?
1. The current flows left to right through R. 2. There is no current flow. 3. The current flows right to left through R.
