In an induction regulator, which winding is mounted so that it can be rotated on its axis?

In an induction regulator, the shunt winding is the component that is mounted in such a way that it can be rotated on its axis. This design allows the induction regulator to adjust the voltage output by varying the coupling between the shunt winding and the rotor, which affects the output power factor and voltage. This adjustability is crucial for the operation of induction regulators, as it helps to control the power distribution in electrical systems.

The shunt winding typically operates at a constant voltage and can be rotated to change how much of the magnetic field it interacts with, thus allowing for fine-tuning of the output voltage. This flexibility is essential in applications where voltage regulation is necessary to maintain the stability and efficiency of the electrical supply.

Other options, such as the series winding, typically remain stationary and are involved in the main power flow, while the neutral and load windings serve different functions that do not involve rotation for voltage adjustment purposes.