12.2 Electromagnetism

• What is the interaction between magnetic fields and electric currents called?

  Electromagnetism
• What is a region around a magnet or electric current where magnetic forces are exerted called?

  Magnetic field
• The magnetic field produced by an electric current is the basis for devices such as motors and transformers
• Electromagnetism refers to the relationship between electricity and magnetism
• What shape does the magnetic field around a current-carrying wire form?

  Circular
• The magnetic field around a current-carrying wire is visualized as concentric circles.


  True
• Match the term with its definition:

  Electromagnetism ↔️ Relationship between electricity and magnetism

  Magnetic Field ↔️ Circular pattern around a current-carrying wire

  Right-Hand Rule ↔️ Method to determine magnetic field direction
• What shape does the magnetic field around a current-carrying wire form?

  Circular
• The magnetic field around a current-carrying wire forms a circular pattern centered on the wire.

  True
• The right-hand rule is used to determine the direction of the magnetic field produced by an electric current
• A ferromagnetic material like iron increases the magnetic field strength compared to air.

  True
• Generators induce an electric current when a conductor moves through a magnetic field.


  True
• An electric current is the flow of electric charge
• The strength of the magnetic field created by an electric current depends on several key factors
• Using a ferromagnetic core, such as iron, increases the magnetic field strength.

  True
• How does increasing the number of turns in a wire affect the magnetic field strength?

  Increases it
• Using a ferromagnetic core material such as iron increases the magnetic field strength
• Factors affecting the magnetic field strength around a current-carrying wire

  1️⃣ Current strength

  2️⃣ Number of turns

  3️⃣ Core material
• The direction your fingers curl in the right-hand rule represents the direction of the magnetic field lines.


  True
• The right-hand grip rule helps determine the direction of the magnetic field around a current-carrying wire.


  True
• The right-hand grip rule states that when your thumb points in the direction of the current, your fingers curl in the direction of the magnetic
• The circular magnetic field pattern around a current-carrying wire is the basis for motors and generators.


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

  Current ↔️ Increases magnetic field strength

  Number of turns ↔️ Enhances magnetic field

  Core material ↔️ Strengthens magnetic field
• The strength of the magnetic field in a motor depends on the current, number of turns, and core material
• Electromagnetism involves the interaction between magnetic fields and electric currents.


  True
• An electric current creates a magnetic field around it.


  True
• What effect does increasing the current in a wire have on the magnetic field strength?

  Increases it
• Arrange the factors affecting magnetic field strength in order from most to least significant:

  1️⃣ Core Material

  2️⃣ Number of Turns

  3️⃣ Current
• Increasing the current in a wire increases the strength of the magnetic field around it.


  True
• The right-hand grip rule helps visualize the direction of the magnetic field by curling your fingers around the wire while pointing your thumb in the direction of the current
• What is the first step in using the right-hand rule?

  Point thumb in current direction
• Electromagnetism describes the relationship between electricity and magnetism
• What type of pattern does the magnetic field around a current-carrying wire form?

  Circular
• Steps to use the right-hand grip rule to visualize the direction of the magnetic field

  1️⃣ Point your right thumb in the direction of the current flow

  2️⃣ Curl your fingers around the wire

  3️⃣ The direction your fingers curl represents the direction of the magnetic field lines
• What does your right thumb represent in the right-hand rule?

  Current flow
• How does electromagnetism produce rotational force in motors?

  Interaction of magnetic fields