Magnets & Electromagnets

What happens when 2 north poles of magnets are facing each other?

• It splits in half

• Nothing

• They repel

• They attract

Tags

NGSS.MS-PS2-3

An Electromagnet is different from a permanent magnet. In order for an electromagnet to work, what must be true?

• It has to be touching another magnet.

• It must be heated until it is almost melting.

• It must have a complete electrical circuit.

• It must be lined up with Earth's magnetic field.

Tags

NGSS.MS-PS2-5

In the picture of the magnets, what do you predict will happen?

• Set A will attract and Set B will repel.

• Set A will repel and Set B will attract.

• They will both attract.

• They will both repel

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A complete electrical circuit made of wire coiled around an iron rod, a battery, and a switch are components of which of the following?

• A permanent magnet

• A natural magnet

• A magnetized paper clip

• An electromagnet

An electromagnet is made by wrapping wire around an iron nail and connecting a battery to allow for an electric current. What would happen if the battery was shut off?

• the nail would fly away

• the magnet would continue working

• the magnet would stop working

• electromagnets are permanent magnets

If more electric wiring is wrapped around the iron nail in an electromagnet, what happens?

• the magnet gets stronger

• the magnet would not change

• the magnet would become weaker

• the magnet would explode

Tags

NGSS.MS-PS2-3

When an electric current is created, what 2 fields surround it?

• static field

• electric field

• force field

• magnetic field

Two components required for electromagnets:

• electric motor

• electrical wiring

• generator

• piece of iron

Electric motors convert:

• electric energy into mechanical energy

• thermal energy into electric energy

• mechanical energy into electric energy

• electricity into magnetic fields

Generators convert:

• electric energy into mechanical energy

• thermal energy into electric energy

• mechanical energy into electric energy

• electricity into magnetic fields

Tags

NGSS.HS-PS3-3