Magnetic flux

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/magnetic-flux

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the discoverer?Michael Faraday (principle of electromagnetic induction related to flux change)
2. What is the SI unit?Weber (Wb), equivalent to volt-seconds (V⋅s) or Telsa-meter squared (Tm²)
3. How do we calculate magnetic flux for a flat surface?For a flat surface with a uniform magnetic field, multiply the field strength B by the area A and the cosine of the angle between the field and the surface’s normal. The formula is Φ = B · A · cos(θ).
4. Why does Faraday's law need changing magnetic flux?Faraday's law says that a voltage is produced when the magnetic flux through a loop changes. If the flux stays the same, no voltage is created.

Magnetic field vector (B): A vector quantity representing the strength and direction of a magnetic field at a point.
Electromotive Force (EMF): The voltage or electrical potential difference induced in a conductor by a changing magnetic flux.
Electromagnetic Induction: The production of an EMF across an electrical conductor in a changing magnetic field.