A )voltage
(i.e differance in electricity field)
Answer:
A
Explanation:
The acceleration of an object is directly proportional to its net force.

It stands for Unified Computing System
I hope I helped :3
True
The electromagnet will become stronger if we add more coils because there are more field lines in a loop then there is in a straight piece of wire. In a solenoid there are a lot of loops and they are concentrated in the middle, as more loops are added the field lines get larger, therefore making the electromagnet stronger.