12.4 Interaction between Electric Currents and Magnetic Fields

Single Charge

• Produces a magnetic field

Current of Charges

• Produces a magnetic field

Compasses around the wire can help you detect the field.

More loops in a wire

• the stronger the magnetic field

Electromagnet

• Iron surrounded by a current carrying wire

Uses

• Separating scrap metal

CERN

• European Center for Nuclear Research

CERN

• Geneva, Switzerland

Barrell Toroid

Barrell Toroid

• Atlas Detector – particle detector at CERN• Goals of Atlas– Why do particles have mass?– What makes up 96% of the universe?– Why does the universe prefer dark mater?

Altas

Altas used to find Higgs Boson

• Particle is believed to gives particles mass

Uses for Superconducting Magnets

• Trains

Uses for Superconducting Magnets

• MRI– Magnetic resonance imaging