According to ampere's experiment, when current flows in an opposite direction on separate circuits in vicinity with one another, a(n) occurs between the two of them.

electromotive force
electrical conductance
magnetic attraction
magnetic repulsion

magnetic attraction

Explanation:

The process of flow of current is best understood by considering the electron motion. Current is the flow of charge from one area of high concentration to an area of lower concentration. This creates a force which causes the current to flow in the circuit.

The charge flows in a particular direction (high to low concentration) down a concentration gradient. The flow of current creates domains.

Opposite directions create opposite domains. These attract each other. The equivalent is a magnetic attraction.

i don't know that i agree with that but what's the question ?

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge