We make it simple to train improvised

Physics - it's not just a boring mountain formulas and challenges, but also very curious and sometimes interesting experiment. Your child is cold in this science, and you want to rekindle interest? Quite possibly this simple experiment will help you with this.

What is needed for the experiment

So, in order to successfully build a "train" us with you will need:

1. The most common Finger or mizinchikovaya battery.

2. Several pieces of round neodymium magnets.

3. And quite a decent length of copper solid conductor minimum cross-section of 1 square millimeter.

Training

So, now take a lead, we clean it from isolation and wound into a helix with any available means a cylindrical shape, the diameter of wound coil should be slightly longer used magnets. You should get something like this:

Wind the wire tightly as possible, turn to turn. Not necessarily to the coil it was from a single piece of wire, it is possible to do several pieces. The main thing is that the direction of the turns are the same, and the overlap between the individual pieces is not less than 3-4 centimeters. All wrapped desired length, now move on.

After that, we take our battery and fasten each end of the magnet as follows:

Now just paste the resulting "Locomotive" in a spiral and watch as the composition of a car quickly passes through the coil.

Well, if you want not to move part or on the contrary pushed back, then do the following: take a magnet with only one end of the battery and turn them over, thus you change the polarity of your "locomotive" go. If a battery with a magnet is pushed out, then just simply insert it into the other end of the coil and all start.

You can even arrange an impromptu competition between the "composition" and, for example, machine.

Interestingly, now let's learn (remember) demonstrated the physics of the process.

Twist the copper wire in the spiral, we'll create a simple spool. And if you skip through it current, inside the magnetic field arises.

And it will be concentrated inside the solenoid created, and on the outside of the field will be extremely weak.

If you put in a rod coil, the induced electromotive force and the magnetic field will result in the rod in motion.

But moving the battery to the magnet, because our coil is not connected to a power source. A salt is contained in the following: our battery acts as the power source, and permanent magnets serve as supply contacts.

Thus, around the "composition" is formed by a magnetic field which interacts with the permanent magnetic field of the magnets and "train" starts to move.

But as you move the batteries and the magnet moves and formed their magnetic field. Thus, we get constant movement.

conclusion

Even through entertainment, you can learn something new. So, having this simple experiment with your child, you can encourage him to ask the most important question: Dad (Mom), and how does it work? On hearing this question, consider that you have won, and interest in physics at the child for a while, but there was.

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