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Simple Zapper Idea Answered

I have learned about electricity in Physics class and that to up the voltage of a given source there has to be an alteration in the amount of turns of wire around some magnets.

BUT... is it possible to do this same thing in my home on a smaller scale by wrapping wires around some of my powerful earth magnets?

The reason for asking is that I want to increase the current flow so that it starts zapping when the wire ends come near, also I want to create a ground based bug zapper for fun that will allow the zap to travel through water (shallow puddles).

Sorry if I'm missing some law of physics that renders this impossible for me but I'm not taking the advanced course for science and we only touched on  the topic electricity.

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also I want to create a ground based bug zapper for fun that will allow the zap to travel through water (shallow puddles).

If you mean by puddles, those laying on the ground,  then the puddles themselves are fairly well "grounded" .   Making a spark jump TO a puddle isn't hard, making it have some effect ON the puddle or what is in the puddle is a whole different story.
 

You're either talking about transformers, or electrical generators.

What do you want to increase the current flow of?

L

The electricity from the batteries I have. (Only got a couple C and D sized batteries)

You want something like a camera-flash unit. Otherwise search this site for "high voltage"

L

So I can use a regular disposable camera right?

Ok thanks, real big help in this project with that last link.

There are a lot like this, but that one is of a high quality.

L