The correct answer is: C. Over excited synchronous motor.
A synchronous condenser is a type of synchronous motor that is operated at a leading power factor. This means that it consumes reactive power from the power system, which can be used to improve the power factor of the system. Synchronous condensers are often used in industrial and commercial applications to improve the power factor of large motors and other loads.
An induction motor is a type of electric motor that uses a rotating magnetic field to induce current in the rotor. The rotor is then driven by the current that is induced in it. Induction motors are the most common type of electric motor in use today.
An under excited synchronous motor is a type of synchronous motor that is operated at a lagging power factor. This means that it supplies reactive power to the power system. Under excited synchronous motors are often used to provide reactive power support to the power system.
A DC generator is a type of electric generator that produces direct current (DC) electricity. DC generators are typically used in applications where DC power is required, such as in battery chargers and electric motors.
In summary, a synchronous condenser is a type of synchronous motor that is operated at a leading power factor. This means that it consumes reactive power from the power system, which can be used to improve the power factor of the system. Synchronous condensers are often used in industrial and commercial applications to improve the power factor of large motors and other loads.