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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
  • inside

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

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  • "The bar magnet is below both coils, but is closer to the 4 loop coil."
  • "The bar magnet is above both coils, but is closer to the 2 loop coil."

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)

  • Button
    • Label: "Grab magnet"
    • Aria description: "Select this to move the magnet."
  • Checkbox
    • Label: "Voltmeter"
    • Aria description: "Play with or without voltmeter connected to light bulb circuit"
  • Checkbox
    • Label: "Field Lines"
    • Aria description: "Hide or show magnetic field lines."
  • Circuit mode
    • Aria description: "Experiment with one or two coils."
    • Radio button group
      • (Radio) 1 coil
      • (Radio) 2 coils
  • Button
    • Label: "Flip magnet"
    • Aria description: "Flip North and South Poles"
  • Button
    • Label: "Reset All"

Example interaction with Pick-up and Drop

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  • Pressed tab.
    • Focus moved to magnet
    • Button label: "Grab magnet."
    • Button description (associated to button w aria-describedby): "Select this to move the magnet."
  • Press enter.
    • Text alert: "Grabbed W A S D keys move in 4 directions. Press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump and Play Edge alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "Released (Proximity to coils)."
    • Keyboard focus is on magnet button.

Third to Fifth time interacting (Slide Prompt)

  • Pressed tab.
    • Focus moved to magnet
    • Button label: "Grab magnet."
    • Button description (associated to button w aria-describedby): "Select this to move the magnet."
  • Press enter.
    • Text alert: "Grabbed try 1 2 3 keys to slide different speeds left and right. Press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump and Play Edge alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "Released. (Proximity to coils)."
    • Keyboard focus is on magnet button.
  • If Tab is pressed
    • Text alert: "Released. (Proximity to coils)."
    • Keyboard focus moved to next focusable item.

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  • Pressed tab.
    • Focus moved to magnet
    • Button label: "Grab magnet."
    • Button description (associated to button w aria-describedby): "Select this to move the magnet."
  • Press enter.
    • Text alert: "Grabbed. Press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump and Play Edge alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "Released. (Proximity to coils)."
    • Keyboard focus is on magnet button.
  • If Tab is pressed
    • Text alert: "Released. (Proximity to coils)."
    • Keyboard focus moved to next focusable item.

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