All Flashcards
What is Electric Current?
The flow of charged particles, driven by voltage (electric potential difference).
What is Electric Permittivity?
Measures how easily an electric field can penetrate a material and how much energy can be stored.
What is Electric Charge?
Fundamental property of matter causing electric forces.
What is a Scalar Field?
Assigns a single value (e.g., temperature, pressure) to every point in space.
What is a Vector Field?
Assigns a vector (e.g., velocity, force) to every point in space. Electric fields are vector fields.
What is Electric Potential Energy?
Energy of a charged particle in an electric field, proportional to charge and voltage.
Label the forces acting on the sphere in the diagram of a charged sphere suspended in an electric field.
1: Tension (T), 2: Gravitational force (mg), 3: Electric force (Fₑ)
What are the differences between Gravitational Force and Electromagnetic Force?
Gravitational Force: Always attractive, weaker at short distances, acts on all matter | Electromagnetic Force: Attractive or repulsive, stronger at short distances, acts only on charged particles
What is the difference between Scalar and Vector Fields?
Scalar Field: Assigns a single value (e.g., temperature) | Vector Field: Assigns a vector (e.g., velocity, force)