Short-Question

# What happens when the nail is wrapped with more wire?

## What happens when the nail is wrapped with more wire?

The more wire you wrap around the nail, the stronger your electromagnet will be. Make certain that you leave enough of the wire unwound so that you can attach the battery. If you could see the magnetic field around a wire that has electricity flowing through it, it would look like a series of circles around the wire.

How does the nail affect the magnetic field?

A magnet made from just a coil of wire isn’t very strong. But when you coil the wire around an iron nail, the magnetic domains inside the nail line up and make a strong, temporary magnet. If you disconnect the wire, the magnetic field disappears and the nail is no longer a magnet.

### What effect would increasing the number of coils around the nail have on the magnetic field of the electromagnet?

The magnetic field strength of an electromagnet is therefore determined by the ampere turns of the coil with the more turns of wire in the coil the greater will be the strength of the magnetic field.

How does the number of times you slide the magnet on the nail affect the nails magnetic ability?

The temporary magnetism is weaker when moved farther out of the magnetic field of the permanent magnet. When the iron nail is placed in a magnetic field, the nail becomes magne- tized. The closer the nail is to the magnet, the stronger the magnetic field of the nail, and the more paperclips it can pick up.

## What is the effect of the tightness of the wire coiled around the nail on the strength of an electromagnet?

If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. Putting a piece of iron or steel inside the coil makes the magnet strong enough to attract objects.

What happened to the nail when one end of the wire was detached?

The electric current from the battery caused the nail to have a magnetic field around it. This magnetic field made the nail act as a magnet (an effect). It became an electromagnet. When the battery was disconnected, the magnetic field went away, and the nail no longer acted as a magnet.

### Why does winding wire around a nail increase the intensity of the magnetic field produced?

By simply wrapping wire that has an electrical current running through it around a nail, you can make an electromagnet. When the electric current moves through a wire, it makes a magnetic field. If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak.