7.2 Electric fields

• What is an electric field defined as?

  Force per unit charge
• Match the property with the field type:

  Force per unit charge ↔️ Electric Field

  Force per unit mass ↔️ Gravitational Field
• The direction of an electric field around a positive charge is outward
• Order the steps to describe the electric field direction for positive and negative charges:

  1️⃣ Positive charge: Emanates outward

  2️⃣ Negative charge: Points inward
• In Coulomb's Law, the force is inversely proportional to the square of the distance
• What do electric field lines represent?

  Direction and strength of field
• The density of electric field lines indicates the strength of the field
• The density of electric field lines indicates the strength of the electric field.

  True
• Match the properties with their field types:

  Electric Field Lines ↔️ From positive to negative

  Gravitational Field Lines ↔️ Towards larger mass
• An electric field is the force per unit charge, while a gravitational field is the force per unit mass.
• Arrange the electric field direction for positive and negative charges:

  1️⃣ Positive charge: Emanates outward

  2️⃣ Negative charge: Emanates inward
• Electric fields and gravitational fields are analogous concepts.


  True
• What type of charges generate electric fields?

  Positive and negative charges
• Electric fields around negative charges point towards the charge.


  True
• What is Coulomb's Law used to calculate?

  Electrostatic force
• Match the property with the correct law:

  Attractive or repulsive force ↔️ Coulomb's Law

  Attractive force only ↔️ Newton's Law of Universal Gravitation
• Electric field lines start at positive charges and end at negative charges.

  True
• Electric field lines start at positive charges and end at negative charges.
• Electric field lines are always perpendicular to the surface of a conductor.
• An electric field is defined as the force per unit charge acting on a test charge.


  True
• The source of an electric field is electric charges, while the source of a gravitational field is masses.


  True
• The electric field around a negative charge points towards the charge.


  True
• The electrostatic force between two charges can be either attractive or repulsive.


  True
• Newton's Law of Universal Gravitation describes a force that is always attractive.


  True
• The density of electric field lines indicates the strength of the electric field.
• The formula for force in an electric field is F = qE.
• Coulomb's Law states that the electrostatic force is inversely proportional to the square of the distance between the charges.
• Coulomb's constant is approximately 8.9875 × 10⁹ N·m²/C².
• Match the properties with their field types:

  Electric Field Lines ↔️ Perpendicular to conductors

  Gravitational Field Lines ↔️ Not applicable
• Electric field lines start at positive charges and end at negative charges.


  True
• Electric field strength is measured in Newtons per Coulomb (N/C) or Volts per meter (V/m).

  True
• A positive charge in an electric field experiences a force in the same direction as the field lines.


  True