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

In the circuit are a:

  • 4 loop coil
  • 2 loop coil (if attached)
  • light bulb
  • voltmeter (if attached)

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


One coilTwo coils different field strengthsTwo coils same field strengthsField strength values
(field strength) magnetic field at the 4 loop coil.(field strength) magnetic field at the 2 loop coil, (field strength) magnetic field at the 4 loop coil.(field strength) magnetic field at both 2 loop and 4 loop coil.

Strong

Moderate

Weak

(question) merge circuit and field lines description to a "snap shot" summary.

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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)

(question) Merge w scene summary

In the circuit are a:

  • 4 loop coil
  • 2 loop coil (if attached)
  • light bulb
  • voltmeter (if attached)

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

Bar Magnet (h3)

The bar magnet is left of 2 loop coil, far from 4 loop coil below.

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

Field Lines (h3) (if enabled)

(question) Merge w scene summary

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Strong

Moderate

Weak

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.

Region #Magnet Release Alert Text
1

“Released at top left of play area, far from coil.”

2“Released at top centre of play area, far from coil.”
3

“Released at top right of play area, far from coil.”

4“Released far from coil below.”
5, 6, 7

“Released, 4 loop coil below.”

8

“Released far from 4 loop coil below.”

9“Released left of 4 loop coil below.”
10“Released, very close to 4 loop coil below.”
11“Released right of 4 loop coil below.”
12“Released left of 4 loop coil.”
13

“Released, just left of 4 loop coil.”

14“Released inside 4 loop coil.”
15

“Released, just right of 4 loop coil.”

16“Released right of 4 loop coil.”
17

“Released at bottom left of play area, far from coil.”

18“Released at bottom-centre of play area, far from coil.”
19

“Released at bottom right of play area, far from coil.”


Region #Magnet Release Alert Text
1

“Released at top left of play area, far from both coils.”

2

“Released above 2 loop coil, Far from 4 loop coil.”

3

“Released at top right of play area, far from both coils.”

4

“Released left of 2 loop coil, far from 4 loop coil below.”

5

“Released just left of 2 loop coil, 4 loop coil below.”

6

“Released inside 2 loop coil.”

7

“Released just right of 2 loop coil, 4 loop coil below.”

8

“Released right of 2 loop coil, far from 4 loop coil below.”

9“Released left of both coils. 2 loop coil above, 4 loop coil below.”
10“Released very close to both coils. 2 loop coil above, 4 loop coil below.”
11

“Released right of both coils. 2 loop coil above, 4 loop coil below.”

12

“Released left of 4 loop coil, far from 2 loop coil above.”

13

“Released just left of 4 loop coil, 2 loop coil above.”

14“Released inside 4 loop coil.”
15

“Released just right of 4 loop coil, 2 loop coil above.”

16

“Released right of 4 loop coil, far from 2 loop coil above.”

17

“Released at bottom left of play area, far from both coils.”

18

“Released below 4 loop coil, Far from 2 loop coil.”

19

“Released at bottom right of play area, far from both coils.”

Example Text Alert Interaction

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