P3_Physicstatements

To experience the maximum force the wire needs to be Bar magnets are permanent magnets, they have 2 poles and they create magnetic fields The electric motor works The direction of the force is reversed if the direction of the current or magnetic field is reversed The size of the force can be increased by increasing the current The size of the force can be increased by using a stronger magnet Wires carrying current generate a magnetic field A split-ring commutator reverses the current direction every half- turn

The direction of the magnetic force at any point is equal to the cross product of current direction and wire position relative to the magnetic field which can be found using Fleming’s left hand rule. 90° to the magnetic field. Magnetic field lines (magnetic flux/lines of force) flow from the north to south pole. The current flows in opposite directions on each side of the coil, so one side is pushed while the other is pulled. More charge is moving in the wire. Increased magnetic field density. A force acts can act on the wire in a magnetic field when we pass a current through a wire. Of the movement of charge within the wire. This movement produces a magnetic field around the wire in the form of concentric circles. The direction of the magnetic force at any point is equal to the cross product of current direction and wire position relative to the magnetic field which can be found using Fleming’s left hand rule.

In the motor effect, magnets + current = movement In the generator movement + magnets = current

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