multiple paths for electrons to flow

Note: If, for example, one of the branches in the parallel circuit is affected, lets say one of the lightbulbs is removed, none of the others will go out because they all have alternate paths to travel, electron flow is not interrupted

Main components: two metal plates immersed in a conducting liquid:

The metal plates are known as electrodes, while the liquid is known as an electrolyte, or electrolytic fluid (usually sulfuric acid)

The two metal plates are usually made of zinc or copper, and there is one of each, a negative (zinc) and a positive terminal (copper). The negative electrode is referred to as the anode, while the positive electrode is referred to as the cathode.

The way it works is the zinc electrode reacts chemically with the electrolyte so that electrons are released from the zinc and collect on the electrode, making it negative, this process slowly wearing away the zinc electrode. Simultaneously, protons collect on the copper electrode, making it positive

very similar to a wet cell except the liquid is a paste

Voltmeters must be hooked up in parallel to measure energy spent in two places and determine their difference.

Ammeters must be hooked up in series, so the ammeter can measure the current directly flowing through it.

(Ohmmeters are rare. They may be connected in series or parallel)

Multimeter is a voltmeter