Magnetism Video

What fundamental connection between electricity and magnetism did Ørsted discover?

• Electricity can be converted into magnetism.

• An electric current produces a magnetic field.

• Magnets can generate electricity.

• Magnetic fields repel electric currents.

What happens when two magnets with the same poles are brought close together?

• They attract each other.

• They repel each other.

• They become demagnetized.

• They generate an electric current.

Which statement accurately describes magnetic field lines?

• They can originate from a single magnetic pole.

• They always form closed loops.

• They point from the South pole to the North pole.

• They are weaker when more crowded.

Can you split a magnet into just a north or just a south pole? (at least a sentence)

How is the First Right-Hand Rule used to determine the direction of a magnetic field produced by an electric current in a wire?

• Point your thumb in the direction of the magnetic field, and your fingers curl in the direction of the current.

• Point your fingers in the direction of the current, and your thumb points in the direction of the magnetic field.

• Point your thumb in the direction of the current, and your curled fingers show the direction of the magnetic field lines.

• Point your palm in the direction of the current, and your fingers show the direction of the magnetic field.

Which factor does NOT directly affect the magnitude of the force from a magnetic field on a current running through a wire?

• The strength of the current.

• The length of the wire.

• The temperature of the wire.

• The angle between the current and the magnetic field.