Answer:
From the negative to the positive cable.
Explanation:
The electrons have negative charge, which means that the negative terminal of the battery will suply the electrons, thus they are present in excess on the negative cable and will jump from it to the positive cable. This current direction is called real current.
I believe the answer is A, temperature and number of particles are constant. Correct me if i'm wrong :)
40V because it will provide the same amount of power.
