5B20.XX Flux Model

Concepts

Electric/magnetic flux through a closed loop as a function of angle

Overview

The model shows how the flux ('number' of field lines) through a closed loop changes as the angle between the field lines and the loop changes. The relation between flux and angle may be quantitatively determined if desired. Note: this demonstration can be passed around a small classroom.

Details

Equipment

  • [1] Flux model made from a 10 x 10 grid of nails
  • [1] Square wire loop

Script

  1. Place the loop on the nail grid at a variety of angles to show that the number of field lines (nails) through the loop changes with angle.

 

Additional Resources

References

  • PIRA 5B20.XX

Disclaimer

  • Don't attempt this at home!

Last revised

  • 2018

Technicals

  • The 'field lines' were made from 3.5" bright finishing nails hammered into a predrilled 10 x 10 grid with a .2125" spacing.
  • The base of the nail 'field line' model is a block of 3.5" x 3.5" x .75" wood.
  • The square wire loop was made from 16 gauge copper wire wound in a single turn around the nail grid to form an approximately 2.5" x 2.5" square loop.
  • The loop was soldered closed for robustness.

Related AV

Related demos

 

If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.