Consider a group of 5 batteries joined up to two pieces of finely engineered metal, that form common positive and negative bridging contactors for the group.
If one of the batteries were to become disconnected for 10ms from it's contact while outputting 25W, because of a knock, would an arc form at the disconnected battery end, even though the electrons can still flow towards the other contacts at that time?
Best Answer
This totally depends on the voltage available across that distance, and the current. Arcs (a plasma channel) has an intrinsically very low resistance, so can be generalized as a short while it exists.
Low voltages (less than around 50vDC) have little ability to sustain (and "draw") an actual arc, because the ignition (ionization) distance must be so small. If high currents are involved at low voltage, spot-welding can happen however.
If that battery is "outputting 25W" then it is in circuit, so it is possible. But this depends on how the batteries are arranged and the load impedance, inductance, capacitance, etc. So the immediate voltage differential with respect to the disconnected terminals is the arcing voltage.