Read the following experiment to answer the questions below:
Merlyn takes a coil of wire and wraps it around an iron nail to make an electromagnet. She connects the coil to a cell and places a magnetic compass near its ends to observe the deflection. The experiment explores how changes in the coil, current, or core affect the compass needle.
1. She disconnects the cell while the compass is placed near end A of the coil. What will be observed?
2. Why does the compass behave in this way?