Presets
Bar Magnet
a single dipole
Magnets · Attracting
N facing S
Magnets · Repelling
N facing N
Quadrupole Ring
4 dipoles, alternating
Single Wire
current out of page
Wires · Same Current
currents attract
Wires · Opposite Current
currents repel
Current Loop
cross-section · ≈ a dipole
Solenoid
cross-section · uniform core
Bar Magnet
Field lines
12
Field vector grid
Animate flow
Colour by strength
Cursor compass
Sources
+ Magnet
+ Wire
× Clear all
Sources:
—
Field lines:
—
—
Drag
a source — reposition it
Click
a source — flip its polarity / current
Right-click
— remove a source
Hover
empty space — compass shows field direction