permanent and induced magnets

• What is meant by a magnetic field?

  Region around a magnet where force acts
• How can you plot the magnetic field pattern of a magnet?

  Using a compass to trace field lines
• What are the two types of magnets mentioned?

  Permanent and induced magnets
• What is a permanent magnet?

  Always has a magnetic field
• What is an induced magnet?

  Becomes a magnet in a magnetic field
• What are the four types of magnetic materials?

  Iron, steel, cobalt, nickel
• What happens when a magnetic material is placed in a magnetic field?

  It experiences a force of attraction
• How does the strength of a magnetic field change with distance?

  It decreases as distance from the magnet increases
• Where is the magnetic field strongest in a magnet?

  At the poles of the magnet
• How can the direction of a magnetic field be found?

  Using a magnetic compass
• What does a compass needle indicate when placed near a bar magnet?

  The direction of the magnetic field
• What is the process of plotting a magnetic field using a compass?

  Place compass, mark points, connect with lines
• What does the direction of the magnetic field lines indicate?

  Runs from North Pole to South Pole
• What does a closer spacing of magnetic field lines indicate?

  Stronger magnetic field
• What does a magnetic compass contain?

  A small bar magnet
• What does the Earth's magnetic field indicate?

  Earth has its own magnetic field
• What causes the Earth's magnetic field?

  The Earth's core
• What direction does a compass needle point when away from magnets?

  North-South direction
• What are the key characteristics of permanent and induced magnets?

  • Permanent magnets: Always have a magnetic field
  • Induced magnets: Become magnets in a magnetic field
• What are the steps to plot a magnetic field pattern using a compass?

  1. Place compass near the magnet
  2. Mark the North Pole of the compass
  3. Move compass and repeat marking
  4. Connect the marks with lines
  5. Indicate direction with arrows
• What are the properties of magnetic materials?

  • Types: Iron, steel, cobalt, nickel
  • Can be permanent or induced magnets
• What is the relationship between distance and magnetic field strength?

  • Strength decreases with distance from the magnet
  • Strongest at the poles of the magnet
• How does a compass work in relation to magnetic fields?

  • Compass contains a small bar magnet
  • Needle aligns with Earth's magnetic field