My magic system consists of a fluid (called aura) emitted from the body whose position can be telekinetically controlled (manipulation), whose physical properties can be altered (transformation), and which can be converted into other forms of energy (transmutation).
Manipulation lets you move aura around with your mind, allowing you to change its position and shape.
Transformation lets you alter physical (but not chemical or atomic) properties, such as changing aura from its natural liquid state to a solid or a gas, or altering things like opacity, material strength, hardness, etc. The one transformation that is particularly relevant to this question is the ability to alter the electrical conductivity of your aura.
Transmutation lets you convert a very small portion of your aura's mass energy into other particles, particularly photons or electrons. This is a continuous rather than instantaneous process, with your output being expressed in watts.
What I'm currently trying to work out is the mechanics of the transmutation of electricity. This works by producing electrons within a volume of your aura (called the transmutative volume), and therefore giving that volume a negative electric charge.
How could I use this ability to create a basic portable circuit and e.g power a torch? This would look like a regular electrical circuit, but with the power source being the negatively charged transmutative volume, rather than a battery or capacitor.
My own educated guess
As I understand it electricity flows through a circuit because a battery or capacitor has both a positive and negative side, which creates a voltage potential that causes electrons to flow from the negative to the positive side. With the transmutative volume however, only a negative charge is produced, meaning there is no corresponding positive side for electrons to flow to. I imagine that you could create a basic capacitor, with the 'positive' plate being a neutrally charged piece of metal, and the negative plate being the transmutative volume, as there will still be a potential difference between the two plates despite the lack of a positive charge. I imagine that, so long as you continue to produce a negative charge in the transmutative volume, electricity will continue to flow to the 'positive' (merely less negative) plate. But would that not eventually result in the entire circuit holding a dangerous charge, as energy is continuously added but not released? Would the only solution be to ground the circuit occasionally to allow the charge to flow away? Or am I thinking about it the wrong way?