If electrons move away from 'A', then 'A' becomes less negatively (or more positively) charged than it was originally.
If electrons move onto 'B', then 'B' becomes more negatively (or less positively) charged than it was originally.
To solve this problem, we will define speed as the amount of distance traveled per unit of time. We will clear the value of time and in parallel we will convert the Units to an international system to facilitate the calculation since we know the speed of light in a vacuum. The speed defined in terms of distance and time would be
The speed of light in a vacuum is and 1ft is equivalent to , so the estimated time would be
We know that 1 second is equivalent to , therefore
Therefore the time is 1.02ns
I think it’s A. Hope it helps
B. Sonar I had the same question what a coincidence but I had a book about it so here's your answer
This is a trick question. Since the planets are in orbit all the time the distance changes, which is because some planets orbit faster than others. I hope this helped at least a little bit.