Why do the positive and negative wires spark when touched?

It is most likely the result of an abrupt electric current flow between the positive and negative wires when they ignite when they come into contact. A short circuit or a large voltage differential between the wires is frequently linked to this phenomena.

Here is a brief justification:

1.  Short circuit:The creation of a low-resistance channel between the positive and negative terminals results in a short circuit. Large currents can flow as a result, which frequently results in sparks. When electrons quickly flow from the negative to the positive terminal, a visible energy discharge occurs, producing a spark

2. High Voltage Difference: Touching the positive and negative wires together may result in a quick flow of electricity and sparks if there is a sizable voltage difference between them.

3.Arcing: The electric current may cause an arc to form when two wires are brought near to one another or come into contact. A bright electrical discharge over a circuit gap is called an arc. This may cause audible sparks to fly and make a cracking sound.