GCSE Combined Science (AQA)

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Magnetic Forces

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Magnetism and electromagnetism Permanent and induced magnetism, magnetic forces and fields

Magnetic Forces

4:06 Introduction to Magnetic Fields
Spec 4.7.1.1 4.7.1.2
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  • Magnets are commonly found in devices like phones, fridges, and headphones.
  • Phones use magnets to convert voices into electrical signals.
  • Fridge magnets stick to metal surfaces.
  • Headphones use magnets to move speakers and create sound waves.
  • Magnetic forces are non-contact forces, acting between separated objects.
  • Example: A magnet can attract a metal paperclip without touching it.
  • Magnetic forces can be attractive or repulsive.
  • Only certain materials, called magnetic materials, are affected by magnetic forces.
  • Iron is an example of a magnetic material and is attracted to magnets.
  • Gold is not a magnetic material and is not affected by magnets.
  • The three magnetic elements are iron, cobalt, and nickel.
  • Alloys containing these elements can also be magnetic.
  • Steel, an alloy containing iron, is a magnetic material.
  • Understanding alloys is more related to chemistry, but knowing when an alloy is magnetic is important in physics.

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