2.10 Describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how this can be investigated experimentally

OKAY THIS IS REALLY CONFUSING BUT I'M GOING TO TRY.

In wires, the higher the voltage, the higher the current and vice versa. If there is virtually no resistance, they are directly proportional.

In resistors, if the current goes down, the voltage will go down, though they are not directly proportional. If resistance goes up, current goes down.

In filament lamps, as the temperature increases, the resistance will increase, therefore the current will go down as the temperature goes up. This also applies to the voltage, although, again, they are not directly proportional.

Diodes only allow current to flow through in one direction. So if it's not in the direction that the diode allows, the current will equal zero

Please help if you know anything about this point, thanks. :)

Note to self - add graphs in from book