Fleming's Left-Hand Rule

When a current-carrying conductor is placed in a magnetic field, it experiences a force. The direction of this force can be determined using Fleming's Left-Hand Rule:

• First finger points in the direction of the Magnetic field (North to South)

• Second finger points in the direction of the Current (positive to negative)

• Thumb points in the direction of the Thrust (force)

How the split ring commutator Works:

• Stationary Magnets: Stay fixed in position

• Rotating Coil: Only the coil rotates between magnetic poles

• Split Ring Commutator: Reverses current every half turn

• Brushes: Maintain electrical contact with rotating commutator

• Current Flow: Shown with animated particles

Use the sliders to:

• Adjust current strength

• Change magnetic field strength

• Control number of coil turns

Motor Effect Equation

The magnitude of the force experienced by the conductor can be calculated using the formula:

Where:
F = Force (Newtons)
B = Magnetic flux density (Tesla)
I = Current (Amperes)
L = Length of conductor in field (meters)

Real-World Applications

The motor effect is the fundamental principle behind:

• Electric motors

• Loudspeakers

• Galvanometers

• Maglev trains

• Electric generators (when reversed)