Magnetism - Review

What is the magnetic field?

• A type of field found in agriculture

• A region around a magnetic material or a moving electric charge within which the force of magnetism acts.

• The energy field around a person's body

• The force of gravity around a magnet

How is the direction of a magnetic field determined?

• By the weight of the magnet

• By the direction in which a north pole of a compass needle points in the field

• By the color of the magnet

• By the temperature of the magnet

Explain the concept of magnetic field lines.

• Imaginary lines that represent the shape of a magnet

• Lines that indicate the temperature of a magnetic field

• Lines that show the path of electric current

• Imaginary lines that show the direction and strength of a magnetic field

What are magnetic poles?

• Points on a magnet where the magnetic force is the weakest

• Regions on a magnet where the magnetic force is the same as the rest of the magnet

• Regions on a magnet where the magnetic force is the strongest

• Areas on a magnet where the magnetic force is non-existent

What happens when like magnetic poles are brought close to each other?

• They repel each other

• They attract each other

• They explode

• They merge into one

Describe the behavior of unlike magnetic poles when brought close to each other.

• Create a neutral field

• Do not interact at all

• Attract each other

• Repel each other

What is magnetic induction?

• The process by which a material becomes electrically charged when placed in a magnetic field.

• The process by which a material changes color when placed in a magnetic field.

• The process by which a material becomes magnetized when it is placed in a magnetic field.

• The process by which a material loses its magnetism when placed in a magnetic field.

Explain the process of magnetic induction with an example.

• When a magnet is moved in and out of a coil of wire, it induces a current in the wire due to magnetic induction.

• Magnetic induction is the process of creating a magnetic field by passing an electric current through a wire

• Magnetic induction occurs when a non-magnetic material is placed near a magnet

• When a magnet is moved closer to a coil of wire, it repels the current in the wire

Name two common magnetic materials and explain their properties.

• Copper and aluminum

• Iron and steel

• Gold and silver

• Wood and plastic

How do magnetic materials differ from non-magnetic materials?

• Non-magnetic materials are attracted to magnets and can be magnetized.

• Magnetic materials have no effect on magnets and cannot be magnetized.

• Magnetic materials can be attracted to magnets and can be magnetized.

• Magnetic materials repel magnets and cannot be magnetized.