Electricity & Magnetism

Magnetic Force on Wire

F = B I L sin θ

Magnetic force on current-carrying wire.

Variables

F

Magnetic force

Force on wire

N

B

Magnetic field

Field strength

T

I

Current

Current in wire

A

L

Length

Wire length in field

m

θ

Angle

Between I and B

°

Derivation

F = IL × B, magnitude |F| = BIL sin θ.

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