Answer:
I think A golf ball shot out of a small cannon
Explanation:
The local charging of the comb is due to induction. The negative object's charge pushes electrons in the comb away from the side close to the charged object causing that part to be positively charged. Note that the comb's net charge is still zero provided it doesn't touch the object. When you move the comb away its electrons will redistribute.
To get a uniform field in the central region between the coils, current flows in the same direction in each.
