Thoughts

Advantages:

Disadvantages:

PDOM

Faraday's Law (h2, Scene Summary)

One CoilTwo Coils

"Faraday's Law‬ is an interactive sim. It changes as you play with it.

At the centre of the play area is a coil connected to a light bulb circuit. There is a also moveable bar magnet.

Grab the magnet to play.

Additional controls that change what is connected to the circuit, flip the bar magnet, and reset the sim. If needed, check out keyboard shortcuts under Sim Resources."

"Faraday's Law‬ is an interactive sim. It changes as you play with it.

At the centre of the play area are two coils connected to a light bulb circuit. There is a also moveable bar magnet.

Grab the magnet to play.

Additional controls that change what is connected to the circuit, flip the bar magnet, and reset the sim. If needed, check out keyboard shortcuts under Sim Resources."

Play Area (h2)

Light Bulb Circuit (h3)

In the circuit are a:

The coil is sideways, with openings on the left and right.

Bar Magnet (h3)

One CoilTwo CoilsRelative Coil Proximity Values

The bar magnet is (relative coil proximity)* 4 loop coil.

North pole on left. South pole on right.

The bar magnet is (relative coil proximity)* 4 loop coil.

The bar magnet (relative coil proximity)* 2 loop coil.

North pole on left. South pole on right.

  • (just) above
  • (just) below
  • (just) left of
  • (just) right of
  • touching outside
  • touching inside of
  • inside

*Two proximity values can be used to describe location - above/below, and left/right. See examples below.

Examples:

Special case: Magnet above / below and far from both coils

Special case: Magnet above / below and closer to one coil than the other

Field Lines (h3)

One CoilTwo CoilsField strength values
The magnet field strength is (field strength) at the 4 loop coil.

The magnet field strength is:

  • (field strength) at the 4 loop coil
  • (field strength) at the 2 loop coil

Very strong

Strong

Weak

Controls Area (h2)

Text Alerts

EventAlert text
Grab magnet: 1st and 2nd time"Grabbed, W A S D keys move in 4 directions. Press Space to release."
Grab magnet: 3rd - 5th time"Grabbed, try 1 2 3 keys to slide different speeds left and right. Press Space to release."
Grab magnet: 6th time"Grabbed, also see keyboard shortcuts under Sim Resources. Press Space to release."
Grab magnet: 7th time"Grabbed. Press Space to release."
Release magnet"(Magnet Release Text Alert)" See below.
Bump Coil"Bumped coil"
Bump Edge"At edge of play area." or "Magnet at edge of play area"


Example Text Alert Interaction

First and Second time interacting (WASD Prompt)

Third to Fifth time interacting (Slide Prompt)

Sixth time onwards (Shortened Grab Alert)

Magnet Release Text Alert Template

The following is used to describe the magnet location when it is released.


Magnet Release Text Alerts

The following diagram depicts the different text alerts fired when the magnet is released.

Unlike previous designs (and implementations), the alert strings are static and depends only on the location of the magnet in the play area when released.

The key implementation detail is being able to determine the center of the 4 loop coil, and boundaries of the two coils so the different regions can be defined.