the motor effect

What is the motor effect

The idea that a current carrying wire in the presence of a magnetic field will experience a force

What does the direction of the magnetic field depend on

The direction of the current and the direction of the force

NOTE

The force always acts at right angles to the magnetic field of the magnets and to the direction of the current in the wire

In motor effect what needs to happens to experience the full force

The wire has to be at 90 degrees to the magnetic field if the wire runs parallel to the magnetic field it won’t experience a force at all

How do you calculate the force

Using F= BIL

Force(N) =magnetic flux density(T) x current(A) x length(m)

What factors affect the size of the force

Magnetic flux density

Current

Length of conductor

Explain how you do the Fleming left hand rule

• place thumb , 1st finger and 2 finger so they are at right angles

• point first finger in direction of the magnetic field from north to south

• Now point your second finger in direction of the conventional current + to -

• The Direction that your thumb is pointing to shows the direction of the force