This pen has a invisible ink, which is one of our ideas. this pen hides quite behind him. Specifically what is hidden is everything you write with the pen because it has a special ink that hides the writing and only be displayed when an ultraviolet light on the foil itself is focused.
Ohm's law shows the relationship between voltage, current and resistance. The current moving through a resistor is proportional to the voltge across the resistor.
Voltage is the amount of energy required to move a charge form one point to another, it is measured in Volts(V). For me this is the best picture because represent how voltage is represent, and how many voltage can have a schematic diagram.
The resistance of an electrical conductor is the opposition to the passage of an electric current through that conductor and it is measured in ohms. This is the best picture for me because represent how resistance is represent in an schematic diagram.
In a circuit, the electrons move through wires and get through the bulb. The electrons get into the bulb and the bulb convert electrical energy into heat(thermal energy) and light(radiant) which is useable energy.
In my opinion the best example of conductors are the cables because it is a metal so electric current can flow through them easily. In the other photo, I take the wool and the wood because are the best examples of insulators because the aren´t metals and is a material used to resist the flow of heat.