Force Due to Magnetic Field

F = BIl sinθ on conductors & F = BQv sinθ on moving charges — rotate the 3D scene to see Fleming’s left-hand rule.

Parameters

1.0 T
5.0 A
0.20 m
90°

Formula

$F = BIl\sin\theta$
F = 1.00 N

Fleming’s left-hand rule: First = B, seCond = I, thuMb = F.

Live Data

B 1.00 T
I 5.00 A
l 0.20 m
θ 90°
F 1.00 N

Key Concepts

  • F = BIl sinθ for a current-carrying conductor.
  • F = BQv sinθ for a moving charge in a field.
  • Use Fleming's left-hand rule: First finger = B, seCond finger = I, thuMb = F.
  • A DC motor uses the turning effect of F on a coil in a magnetic field.
Force (F)
Current (I) / Velocity (v)
Magnetic Field (B)
Drag to rotate • Scroll to zoom
Fleming's left-hand rule: First = B, seCond = I, thuMb = F