The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage. You can make a temporary magnet by stroking a piece of iron or steel (such as a needle) along a permanent magnet.

north pole

Which metal and which power supply are used to make a permanent magnet? metal = iron; power supply = 6 V a.c.

Place your weak magnet within the magnetic field of a much stronger magnet. Setting it right next to the magnet will produce the best result. The stronger magnet will actually help realign electrons that have spun out of axis since it’s creation. Stroke the weak magnet with your larger, stronger magnet.

Yes, stacking multiple magnets together can make them stronger. Two or more magnets stacked together will exhibit nearly the same strength as a single magnet of the combined size.

In other words, if you hold two magnets together so that like-poles are close together (two norths OR two souths), they repel. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).

Two magnets together will be slightly less than twice as strong as one magnet. When magnets are stuck entirely together (the south pole of one magnet is connected to the north pole of the other magnet) you can add the magnetic fields together.

Like poles repel, pushing the magnets away, and unlike poles attract, pulling the magnets together.

If you line the magnets up so that two of the same poles face each other, the magnets will push away. This is called repulsion. Opposite poles attract each other, but similar poles repel.

In any magnet, there are areas where the force of magnetism is strongest. These areas are called the poles. If the north pole of one magnet lines up with the south pole of another, the magnets pull together. If the north pole of one magnet meets the north pole of another (or south meets south), the magnets push apart.

Background:  A magnet creates an invisible force field around it called a magnetic field: an area of invisible force that can pull/attract (bring together) two objects or push/repel (push apart) two objects.

Push and pull are the forces that are used to put an object into motion….Examples

• Thumb Pins.
• Opening and Closing a Door.
• Pushing a Car.
• Pulling a Cart.
• Inserting and Removing a Plug.
• Water Dispensers.
• Pulling Curtains and Blinds.
• Pushing Furniture.

Chapter 2: Why does the train rise without anything touching it? Students figure out: When the train starts moving as it rises off the track, it does so because of a non-touching force: magnetic force. The train rises because a repelling force acts between magnets on the tracks and magnets on the train.

Some objects experience forces from things that are not touching them. Magnets can be used to make other magnets and things made of iron move without being touched.

The magnetic interaction is an example of what scientists call an ‘action-at-a-distance’ – this is an interaction in which objects can push or pull on each other without touching. The most common example of this is gravity!

No, magnets can repel against each other and it is still a magnetic force.

A wire that has electrical current running through it creates a magnetic field. In fact, the simplest electromagnet is a single wire that is coiled up and has an electric current running through it. The magnetic field generated by the coil of wire is like a regular bar magnet.

The correct option is C) Soft iron. Soft iron is selected for making the core of an electromagnet because the core is used in a solenoid for the production of the strongest magnetism.

Describe what happens if you hold a nail or paper clip near the coil. The object vibrates, or gets pulled into the coil.

The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.

You turn off the electro part. Electromagnets can be created by passing electric current through a looped wire. The loop allows one to use the magnetic field that can be generated by the current, but if you switch the current off then obviously there is no electric current and hence no induced magnetic field.

You can create a stronger, more concentrated magnetic field by taking wire and forming it into a coil called a solenoid. In the presence of a magnet, these filings will rearrange themselves according to the magnetic lines of force (flux lines). …