Force Due to Magnetic Field

F = BIl sinθ on conductors & F = BQv sinθ on moving charges

Parameters

Magnetic Field B (T)

1.0 T

Current I (A)

5.0 A

Wire Length l (m)

0.20 m

Angle θ (°)

90°

Formula

$F = BIl\sin\theta$

F = 1.00 N

Legend

Force (F)
Current (I) / Velocity (v)
Magnetic Field (B)

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.