How do you build a conductivity tester?
Take two pieces of wire, one battery and one light bulb. Battery and light bulb should be the same voltage. Attach one end of one piece of wire to one pole of the battery (Soldering it would be best). Attach one end of the other piece of wire to the other pole of the battery and the other end of the wire to side conductor of the light bulb. You are done. To test the conductivity of something you simply touch the center conductor of the light bulb to one end of what you’re testing and the other end of the first piece of wire to the other end of what you’re testing. If what you’re testing conducts electricity the current will run from the battery through what you’re testing into the light bulb, out the other side of the light bulb and back to the battery and the light bulb will light up. If what you’re testing doesn’t conduct electricity, the electricity from the battery will not be able to pass through it to the light bulb and it won’t light up. Good luck!
