Cards (26)

    • What is a magnetic field?
      A region of magnetic force
    • Magnetic fields extend from the North pole to the South pole.South
    • Field lines are closer together in areas where the magnetic force is stronger.
    • What type of fields are magnetic fields?
      Three-dimensional
    • Compass needles align with the direction of the magnetic field
    • Match the source of the magnetic field with its visualization method:
      Permanent magnet ↔️ Field line diagrams
      Electromagnet ↔️ Compass needles
    • The two key properties of magnetic fields are direction and strength.
    • What direction does a magnetic field extend from?
      North to South pole
    • The strength of a magnetic field is represented by the density of its field lines
    • Where is the strength of a magnetic field typically greatest?
      Near the poles
    • Order the locations of a magnet from strongest to weakest field strength:
      1️⃣ Near poles
      2️⃣ Away from poles
      3️⃣ Center of magnet
    • What are the three primary sources of magnetic fields?
      Permanent magnets, electromagnets, Earth's core
    • Permanent magnets generate magnetic fields through the alignment of electron spins
    • How can the strength of an electromagnet's magnetic field be adjusted?
      By changing the current
    • What is the Earth's magnetic field generated by?
      Movement of molten iron
    • The density of magnetic field lines represents the field's strength
    • Magnetic fields originate from three primary sources: permanent magnets, electromagnets, and the Earth's core
    • Match the source of the magnetic field with its mechanism:
      Permanent Magnets ↔️ Alignment of electron spins
      Electromagnets ↔️ Current flowing through coils
      Earth's Magnetic Field ↔️ Movement of molten iron
    • The Earth's magnetic field is static and unchanging.
      False
    • From which pole do magnetic field lines originate?
      North pole
    • The density of magnetic field lines represents the field's strength
    • To which pole do magnetic field lines return?
      South pole
    • The magnetic field lines of a horseshoe magnet are densest between the poles
    • What type of magnetic field does a straight current-carrying wire produce?
      Circular field
    • A solenoid creates a stronger magnetic field inside compared to a straight wire.
    • Match the magnetic field source with its characteristic:
      Permanent Magnets ↔️ Fixed field strength
      Electromagnets ↔️ Adjustable field strength