Outline three items that make up the impedance of a synchronous generator.

1. Resistance: This is the opposition to the flow of current in the generator's windings and is typically caused by the resistance of the copper wire used in the windings.

2. Reactance: This is the opposition to the flow of alternating current in the generator's windings and is caused by the inductance of the windings.

3. Leakage impedance: This is the impedance caused by the leakage flux in the generator, which occurs when some of the magnetic flux produced by the rotor does not link with the stator windings.

1. Armature Resistance (Ra): The resistance offered by the stator windings to the flow of current.
2. Synchronous Reactance (Xs): The opposition to the flow of alternating current due to the rotating magnetic field.
3. Field Reactance (Xf): The opposition to the flow of field current due to the self-inductance of the field windings.