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.
What are the steps of charging by friction?
Rubbing objects together transfers electrons, creating charged objects.
What are the steps of charging by conduction?
Direct contact allows electrons to flow, equalizing charges.
What are the steps of charging by induction?
Bringing a charged object near a neutral one redistributes charges within the neutral object.
How do you apply Coulomb's Law?
Identify the charges (q1, q2), measure the distance (r) between them, and use the formula:
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)