PhET Faraday's Law Simulation - PDOM Sketch

Alerts

Magnet Focus Alert

• "Magnet at [location] of the Play Area. Use the W A S D keys to move magnet. Use number keys 1, 2, 3 to jump magnet."

Movement Alert

• "[step direction]"

Movement Alert: direction or step size change

• "[step direction] 1 [step size] step."

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

• "Jumping magnet [jump speed] to [jump direction] side of play area. Press Space to stop jump."

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

• "Jumping stopped."

Jumping in progress

• "Jumping to [jump direction]."
• Alert Frequency: This is a lower priority alert. If one of the other alerts / events has occurred it is not be necessary to give this movement alert.

Coil bump alert

• "Bumped into [number coils] coil."

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

• "At [location] of play area."

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

• "[coil proximity] 4-loop coil. [coil proximity] 2-loop coil." (only if 2-loop coil is enabled)
• Remark: This alert is omitted if the user's action will trigger an Entering or Exiting Coil alert.

Entering / Exiting Coil Alert

• "[Entering / Exiting] [number coils] coil."

Coil proximity change event with magnetic field enabled

• "[coil proximity] 4-loop coil and [field strength] magnetic field passing through. [coil proximity] 2-loop coil and [field strength] magnetic field passing through." (only if 2-loop coil is enabled)

Volt meter: adding / removing

• "[Connecting / removing] volt meter to circuit"

Magnetic field: show / hide

• "Showing magnetic field lines. [field strength] magnetic field passing through 4 loop coil. [field strength] magnetic field passing through 2 loop coil. (only if 2-loop coil is enabled)"
• "Hiding magnetic field lines.

2 loop coil: show / hide

• "[Adding / removing] 2 loop coil [to / from] circuit."

Rotate magnet

• "Flipping magnet: North pole is now on [left / right]. South pole now on [right / left]."

Rotate magnet: with visible field lines

• "Flipping magnet and its magnetic field: North pole is now on [left / right]. South pole now on [right / left]."
• Remark: This is the same description as a regular "Rotate Magnet" alert text with the addition of "and its magnetic field".

Alert Descriptor Values

step direction:

• left
• right
• up
• down

step size:

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

jump speed:

• slowly (1 key pressed)
• normally (2 key pressed)
• quickly (3 key pressed)

jump direction:

• left
• right

number coils:

• 2 loop
• 4 loop

location:

• top-left
• top-center
• top-right
• middle-left
• middle-right
• center
• bottom-left
• bottom-center
• bottom-right
• +edge if at edge

coil proximity:

• Far from
• Close to
• Very close to
• In

field strength:

• Very strong
• Strong
• Weak
• Very weak
• Minimal