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Faraday's Law (h2, Scene Summary)

ExampleTemplate*

Faraday's Law‬ is an interactive sim. It changes as you play with the movable bar magnet.

At the centre of the play area are a 2 loop and a 4 loop coil connected to a light bulb circuit.A voltmeter is also attached to the circuit.

The two coils are sideways, both with openings on the left and right.

Magnetic field is weak  at the 2 loop coil, moderate magnetic field at the 4 loop coil.

Grab the magnet to play.

There are 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 the movable bar magnet."

"At the centre of the play area" + (is a 4 loop coil / are a 2 loop and a 4 loop coil) + "connected to a light bulb circuit." /If voltmeter attached/ "A voltmeter is also attached to the circuit."

"The" + (coil is / two coils are) + "sideways," + (with / both with) + "openings on the left and right."

/ If field lines visible - One coil /
"Magnetic field is" + (strong / moderate / weak) + "at the coil."

/ If field lines visible - Two coils with different field strengths /
"Magnetic field is

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" +(strong / moderate / weak)

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+ "at the 2 loop coil,

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" + (strong / moderate / weak) + "magnetic field at the 4 loop coil."

/ If field lines visible - Two coils, same field strengths /
"Magnetic field

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is" + (strong / moderate / weak) + "at both coils."

"Grab the magnet to play.

There are 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."

* Emphasis added for legibility

Play Area (h2)

Bar Magnet (h3)

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ExampleTemplate

Magnet above right of 2 loop coil

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.

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Magnet North pole on left South on right.

(Button "Grab magnet")

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/ If one coil /

Follows "Magnet Release Text Alerts - One Coil" (see below),

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but the word "Released"

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replaced with "

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Magnet".

/ If two coils /

Follows "Magnet Release Text Alerts - Two Coils" (see below), but the word "Released" replaced with "Magnet".

/ Polarity according to whether or not it's flipped /

"Magnet" + (North / south) + "pole on left" + (South / North) + "on right."

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Button

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: "Grab magnet"

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"Once grabbed, W A S D and Arrow Keys moves magnet in 4 directions, 1 2 3 keys slides magnet left and right different speeds."

(question) Insert instructions on cursor moves and sliding. Make sure to mention that they have to grab first "once grabbed".



Controls Area (h2)

  • 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"

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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.

Magnet Release Text Alerts - One Coil

Region #Magnet Release Alert TextRegion #Magnet Release Alert Text
1, 4, 9

“Released above left of coil.”

15“Released just right of coil.”
2, 5, 6, 7, 10“Released, above coil.”16“Released right of coil.”
3, 8. 11

“Released above right of coil.”

17“Released below left of coil.”
12“Released left of coil.”18“Released just below coil.”
13“Released just left coil.”19“Released below right of coil.”
14“Released inside coil.”

Magnet Release Text Alerts - Two Coils

Region #Magnet Release Alert TextRegion #Magnet Release Alert Text
1“Released above left of 2 loop coil.”12"Released left of 4 loop coil."
2"Released just above 2 loop coil"13"Released just left of 4 loop coil."
3"Released above right of 2 loop coil"14"Released inside 4 loop coil."
4"Released left of 2 loop coil"15"Released just right of 4 loop coil."
5"Released just left of 2 loop coil"16"Released right of 4 loop coil."
6"Released inside 2 loop coil"17"Released below left of 4 loop coil."
7"Released just right of 2 loop coil."18"Released just below 4 loop coil."
8"Released right 2 loop coil."19"Released below right of 4 loop coil."




9"Released left of both coils."11"Released right of both coils."
10"Released between both coils."

Example Text Alert Interaction

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