Uploaded June 2026 | Updated September 2026, 3 weeks ago
This animation introduces the fundamental ideas behind calculating electric and magnetic flux, beginning with simple geometry and building toward the full surface integral.
We start with a flat surface in a uniform field, showing how flux depends on:
*field strength
*surface area
*the angle between the field and the area vector
The animation then explores how flux can be understood geometrically through projections, helping visualize the cosine dependence in the dot product.
Next, we move to a non-uniform field, where the field varies across the surface. By subdividing the surface into smaller regions and summing their contributions, we build toward the concept of a surface integral.
Finally, we extend this idea to curved surfaces, showing how increasingly small surface elements become locally flat and lead naturally to the full expression for flux as a surface integral.
Accessible Alternative Media: An accessible, e‑reader‑friendly version of this animation, including full narration and descriptive audio, is available. A link to the alternative media appears in a YouTube card at the beginning of the video.
Topics covered:
*Electric flux
*Magnetic flux
*Dot product (F dot A)
*Surface geometry and projections
*Non-uniform fields
*Riemann sums and surface integrals
*Curved surfaces and local flatness
Who this is for:
*Introductory physics students
*Calculus-based E&M courses
*Self-learners studying vector fields and flux
*Instructors looking for visual teaching resources
Keywords:
electric flux, magnetic flux, flux physics, surface integral, flux integral, Gauss law intuition, vector field visualization, dot product physics, F dot A, cos theta flux, area vector physics, flux calculation, physics animation flux, non uniform field flux, curved surface flux, Riemann sum physics, calculus physics flux, electromagnetism basics, intro physics E&M, physics visualization
This animation introduces the fundamental ideas behind calculating electric and magnetic flux, beginning with simple geometry and building toward the full surface integral.
We start with a flat surface in a uniform field, showing how flux depends on:
*field strength
*surface area
*the angle between the field and the area vector
The animation then explores how flux can be understood geometrically through projections, helping visualize the cosine dependence in the dot product.
Next, we move to a non-uniform field, where the field varies across the surface. By subdividing the surface into smaller regions and summing their contributions, we build toward the concept of a surface integral.
Finally, we extend this idea to curved surfaces, showing how increasingly small surface elements become locally flat and lead naturally to the full expression for flux as a surface integral.
Accessible Alternative Media: An accessible, e‑reader‑friendly version of this animation, including full narration and descriptive audio, is available. A link to the alternative media appears in a YouTube card at the beginning of the video.
Topics covered:
*Electric flux
*Magnetic flux
*Dot product (F dot A)
*Surface geometry and projections
*Non-uniform fields
*Riemann sums and surface integrals
*Curved surfaces and local flatness
Who this is for:
*Introductory physics students
*Calculus-based E&M courses
*Self-learners studying vector fields and flux
*Instructors looking for visual teaching resources
Keywords:
electric flux, magnetic flux, flux physics, surface integral, flux integral, Gauss law intuition, vector field visualization, dot product physics, F dot A, cos theta flux, area vector physics, flux calculation, physics animation flux, non uniform field flux, curved surface flux, Riemann sum physics, calculus physics flux, electromagnetism basics, intro physics E&M, physics visualization
