Electromagnetism

An electric current produces what?

• magnetic field

• magnet

• solenoid

• insulator

What kind of magnet can be turned on and off? (Man-made magnet)

• refrigerator

  magnet

• iron

• electromagnet

• magnetite

How do you change the strength of a magnetic field?

• Add more current through the wire or add more loops

• Add more current or spin it very fast

• Add more current through the iron core or through the wire

• Add more loops or make the coils closer together

A coil of wire with an electric current in it is called a(n)------------------------

• transformer

• electric generator

• electric motor

•  solenoid

What Is Electromagnetism?

• the interaction of electric currents or fields and magnetic fields.

• a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.

• a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

• the strength and vitality required for sustained physical or mental activity.

What happens When the North Pole of a Magnet meets another North Pole of a Magnet

• They attract each other

• Nothing happens

• They repel each other

What happens when an electric current flows through a wire?

• The wire begins to spin.

• A magnetic field is created around the wire.

• A field of gravity is created around the wire.

• Nothing happens.

What three minerals are attracted to a magnet?

• Gold, copper, cobalt

• Iron, nickel, cobalt

• Iron, copper, aluminum

• Cobalt, aluminum, silver

These magnetic domains are---------------------.

• strongly magnetized

• slightly magnetized

• unmagnetized

Which electromagnet is the strongest?

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