magnetic fields

• 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 do you do first when plotting a magnetic field with a compass?

  Place the compass near the North Pole
• What does the compass needle indicate when near a magnet?

  The direction of the magnetic field
• What do you do after placing the compass near the North Pole?

  Draw a cross at the North Pole
• How do you complete the plotting of the magnetic field?

  Connect the dots with a line and arrows
• What does the closeness of 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 concepts related to magnetic fields?

  • Definition of magnetic field
  • Types of magnets: permanent and induced
  • Types of magnetic materials: iron, steel, cobalt, nickel
  • Plotting magnetic field patterns using a compass
  • Earth's magnetic field and its origin