7.1.1 Magnetic Fields

• The strength of a magnetic field is measured by the force exerted per unit magnetic pole
• Magnetic field lines form continuous loops.

  True
• What is the unit of magnetic field strength?

  Tesla (T)
• Magnetic field lines have a beginning and end.

  False
• Arrange the factors affecting magnetic field strength in order of their effect:

  1️⃣ Distance from the magnet

  2️⃣ Strength of the magnet

  3️⃣ Medium surrounding the magnet
• What is a magnetic field?

  Region around a magnet
• The strength of a magnetic field is measured in tesla
• How is the strength of a magnetic field measured?

  Force per unit pole
• Magnetic field lines start and end on charges.

  False
• Magnetic field lines form continuous loops around a magnet.
• The magnetic field is stronger closer to the magnet.


  True
• Match the material with its effect on magnetic field strength:

  Vacuum ↔️ Baseline magnetic field

  Air ↔️ Slightly reduces magnetic field strength

  Iron ↔️ Significantly enhances magnetic field strength
• Magnetic field lines have a beginning and end on magnetic poles.

  False
• What is the unit of field strength in electric fields?

  Newtons per coulomb
• Magnetic field lines run from the north
• What is the direction of the magnetic field at any point along a field line?

  Tangent
• Magnetic field lines form continuous loops
• Magnetic field lines radiate from charges.

  False
• The magnetic field is stronger closer to the magnet.


  True
• Match the material with its effect on magnetic field strength:

  Vacuum ↔️ Baseline magnetic field

  Air ↔️ Slightly reduces field

  Iron ↔️ Enhances field
• What is a magnetic field?

  Region around a magnet
• What are the sources of magnetic fields?

  Permanent magnets, electric currents
• Match the field strength unit with the type of field:

  Magnetic Field ↔️ Tesla (T)

  Electric Field ↔️ N/C
• Magnetic field lines run from the north pole to the south pole
• How is the strength of a magnetic field measured?

  Force per unit magnetic pole
• Magnetic field lines form continuous loops.


  True
• Magnetic field lines run from the north pole to the south pole.
• What is the direction of magnetic field lines outside a magnet?

  North to South
• What is the unit of magnetic field strength?

  Tesla
• How does iron affect magnetic field strength?

  Enhances it
• What does the density of magnetic field lines indicate?

  Field strength
• An electric current generates a magnetic field around the wire.
• What shows the direction of a magnetic field?

  Magnetic field lines
• Magnetic field lines have a beginning and an end.

  False
• Magnetic field lines start and end on charges like electric field lines.

  False
• What is the direction of magnetic field lines?

  North to South
• Magnetic field strength is measured in tesla
• What is magnetic field strength defined as?

  Force per unit magnetic pole
• Factors affecting magnetic field strength from strongest to weakest:

  1️⃣ Closer to the magnet

  2️⃣ Stronger magnet

  3️⃣ Medium surrounding the magnet
• Which type of magnet produces a stronger magnetic field?

  Stronger magnets