How do you make a light bulb run off of batteries and maggnets?

Question

this is for a 7th grade science expiriment

Answer 1

I suggest you use an automobile lamp, and not a regular house light bulb, because the voltage you'll need will be much smaller. Get a small lamp, like one for a turn signal, not a headlamp. Most all automotive lamps require 12 volts, which will take 8 batteries wired in series (plus to minus, plus to minus, etc). Use "D" cells.

It may be a little hard getting the wires to stick to the batteries. Solder them if you have access to a soldering iron. I suggest you scratch the surface of the metal a little bit before you solder--it will help the solder to bond to the metal.

You could also use a 3 volt flashlight lamp, which would only require 2 batteries wired in series, but that wouldn't be quite as impressive.

Incorporating a magnet is going to be a little bit trickier. The prior answer suggested making a generator, but I can tell you it would be almost impossible to get enough voltage and current out of a homemade generator to light a light bulb.

However, you can use the magnet together with a reed switch to turn the light bulb on and off. In the home, reed switches are used in burglar alarm sensors for windows and doors. In my home, I have a small magnet attached to each window. When the window is closed, the magnet lines up with a reed switch sensor mounted to the window frame, causing the contacts on the switch to close. When the window is open, the magnet is too far away from the reed switch and the contacts open up.

You should be able to get the reed switch at Radio Shack or possibly Home Depot. Look in the burglar alarm section. It will look like a little rectangular plastic thing about the size of a lipstick, with two wires or screw terminals. If you open it up very carefully, you'll probably find a small glass tube with two wires coming out of it. This is the reed switch. Opening it up is optional, however, because you may break the insides.

Just wire the reed switch in series with the batteries and the light bulb. Bringing the magnet near the switch will close the circuit and turn on the light bulb.

Answer 2

Easy to make a light bulb run off batteries. Flashlights to it all the time. Of course, if you wanted to operate a typical floor lamp, it would need a bunch of batteries in series.

To make it light using a magnet, One would need to utilize the magnet as part of a generator. A little more difficult. One could demonstrate the feasibility by wrapping a good many turns of wire around a toilet paper tube, and pushing a magnet up and down the tube. If a voltmeter were attached to the ends of the wire, it would read a voltage during the magnet motion. Probably the voltage would be too low to light a lamp, but might light a LED (light emitting diode.)

Answer 3

The battery will produce an output which will proceed to be quite consistent. The extra bulbs you upload, the further this output must be shared out. the purely way you'll preserve a consistent quantity of sunshine from all 3 bulbs, is to apply 3 separate batteries, one for each bulb. Or, if no longer wonderful adequate, 2 batteries in line with bulb.

Answer 4

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