PhET Faraday's Law - Old Alerts and Descriptions

Owned by Jonathan Hung
Last updated: Aug 31, 2018
2 min read

Old Text Alerts

Initial step made after: focusing; step direction change; or step size change

  • "[step size] step  [step direction]."
  • Note: there is no alert for steps made after an initial step. Subsequent steps will have a magnet move sonification mapped to velocity.

Location Alerts

Location change alert: magnet transitions from one location region into another


  • "[location] of play area."


Coil proximity change alert: magnet transitions from one coil proximity region into another


  • Single coil: "[coil proximity] 4-loop coil."
  • Both coils: "[coil proximity] 4-loop coil. [coil proximity] 2-loop coil."
  • (info) Alert Frequency: This alert is omitted if the user's action will trigger an Entrance Direction or Exiting Coil alert.


Coil proximity change event with magnetic field enabled


  • Single coil: "[coil proximity] 4-loop coil. [field strength] magnetic field passing through."
  • Both coils: "[coil proximity] 4-loop coil. [field strength] magnetic field passing through. [coil proximity] 2-loop coil and [field strength] magnetic field passing through."
  • (info) Alert Frequency: This alert is omitted if the user's action will trigger an Entrance Direction or Exiting Coil alert.


Coil Entrance Direction Alert


  • "[number coils] coil to [left / right]."
  • "Coil no longer to [left / right]."
  • (info) Alert Frequency: this alert should occur only once and during the transition into the region.

Exiting Coil Alert

  • "Exiting [number coils] coil."


step direction:

  • left
  • right
  • up
  • down

step size:

  • regular (default)
  • large (if CTRL modifier pressed)
  • small (if Shift modifier pressed)


Slide start alert: on release of 1, 2, or 3 key press

  • "Sliding [slide speed]  [slide direction]. Press Space to stop slide."

Slide stop alert: Space bar is pressed, bumped into a coil or reached edge of play area

  • "Sliding stopped. Magnet [location] of play area."

Sliding in progress

  • Note: there is no alert for sliding in progress as there will be a magnet move sonification mapped to velocity.