8.3 Electric Fields

• F in the electric field equation represents the electric force vector
• What generates electric fields?

  Electric charges
• Steps in the superposition principle for electric fields:

  1️⃣ Calculate the electric field from each charge

  2️⃣ Add the electric fields vectorially
• Electric fields can be both attractive and repulsive, while gravitational fields are always attractive.

  True
• Where is a uniform electric field commonly found?

  Between parallel charged plates
• The electric field strength decreases with the square of the distance
• The inverse square law applies to both electric and gravitational fields.


  True
• What is the mathematical definition of the electric field?

  $E =$$F / q$
• The inverse square law describes how electric field strength decreases with distance.


  True
• The electric field strength is directly proportional to the charge
• What are the two main factors that determine the strength of an electric field?

  Charge and distance
• What do electric field lines visualize?

  Direction and strength
• Parallel and evenly spaced field lines indicate a uniform electric field.


  True
• What is the mathematical definition of the electric field (E)?

  $E =$$F / q$
• What does 'q' in the electric field equation represent?

  Magnitude of the charge
• Positive charges create electric fields that radiate outward
• The inverse square law states that electric field strength decreases with the square of the distance
• What is the direction of the electric field created by positive charges?

  Outward
• What determines the strength of a gravitational field?

  Mass
• Where is a uniform electric field often found?

  Parallel charged plates
• A stronger electric field is created by a larger amount of electric charge
• Electric fields affect charged particles, while gravity affects mass.

  True
• A uniform electric field has constant magnitude and direction
• What are the two factors that determine the strength of an electric field?

  Charge and distance
• What is the relationship between the electric field strength and the distance from the charge?

  Inverse square law
• The strength of an electric field is inversely proportional to the square of the distance
• Order the properties and rules for drawing electric field lines:

  1️⃣ Lines originate from positive charges

  2️⃣ Lines are perpendicular to charged conductors

  3️⃣ Lines never cross each other

  4️⃣ Line density indicates field strength
• Match the property with its description for electric and gravitational field lines:

  Source for electric fields ↔️ Electric charges

  Source for gravitational fields ↔️ Masses
• What type of particles do electric fields affect?

  Charged particles
• Match the property of electric fields with its corresponding characteristic:

  Strength ↔️ Determined by charge

  Direction ↔️ Can be attractive or repulsive

  Type ↔️ Vector field
• What is the direction of the electric field created by negative charges?

  Inward
• Positive charges produce electric fields that radiate outward
• The strength of an electric field decreases with the square of the distance
• The superposition principle states that electric fields from multiple charges add vectorially.


  True
• Unlike gravity, electric fields can be both attractive and repulsive
• The electric field strength decreases with the square of the distance from the charge.


  True
• The superposition principle states that electric fields from multiple charges add vectorially
• Match the property with the correct field:

  Electric Field ↔️ Can be attractive or repulsive

  Gravitational Field ↔️ Always attractive
• How does increasing the charge affect the electric field strength?

  Increases the strength
• The directionality of a gravitational field is always attractive.


  True