Understanding Magnetism and Electric Currents 5

Magnetism

Phenomenon of attracting metals from a distance.

Lodestones

Natural magnets that attract metals.

North Pole

End of a magnet pointing towards Polaris.

South Pole

Opposite end of a magnet from North.

Magnetic Field

Area around a magnet where magnetic forces exist.

Magnetisable Materials

Metals that align with magnetic fields.

Hans Christian Oerstad

Discovered electric currents produce magnetic fields.

Electromagnet

Magnet created by electric current in wire.

Current Strength

Higher voltage increases magnetic field strength.

Wire Wrapping

More turns of wire enhance magnetic field.

Solenoid

Wire coiled around a support generating magnetic field.

Mechanical Energy

Energy converted from electrical energy in solenoids.

Applications of Solenoids

Used in cars, locks, MRI machines, and speakers.

Electromagnetism

Phenomenon where electric currents mimic magnets.

Circular Magnetic Fields

Shape of magnetic fields around electric currents.

Magnetic Force

Force experienced by current in a magnetic field.

Electromagnet Activity

Experiment to create a magnet that lifts paperclips.

Magnetic Interaction

Current interacts with magnetic field forces.

Voltage Supply

Power source for increasing current strength.

Magnetic Field Direction

Conventional flow from North to South pole.

Faraday's Demonstration

Showed currents feel forces in magnetic fields.