Mammoth Memory

How to make the motor turn the other way

Reverse the current

If you reverse the battery, you also reverse the current supply. Using Flemings left hand rule (i.e. electricity passing through the wire (Left = Electricity in wire)) you can see below that the forces on the wire reverse and therefore the motor spins in the other direction.

Reversing the current to reverse the motor

Reverse the magnetic field

Again using Flemings left hand rule you can see that the forces on the wire have reversed. The spinning shaft of the motor will spin in the other direction.

Reversing the magnetic field to reverse the motor

Reverse the current and the magnetic field

If you reverse the current and the magnetic field as far as the direction of the spinning shaft goes there is NO CHANGE.

This can again be verified using Flemings left hand rule.

Reversing the current and the magnetic field does not reverse the motor

 

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