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.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.