The correct answer is: C. synchronous condenser.
A synchronous condenser is a type of synchronous motor that is used to improve the power factor of an electrical system. It does this by absorbing reactive power from the system, which helps to reduce the overall current draw. Synchronous condensers are often used in industrial and commercial settings, where they can help to reduce energy costs and improve system stability.
A static condenser is a type of capacitor that is used to store electrical energy. It does this by using two conductive plates that are separated by an insulating material. When an electric field is applied to the plates, the electrons on the plates will move, creating a current. Static condensers are often used in power supplies and other electronic devices.
A condenser is a device that stores electrical energy. It does this by using two conductive plates that are separated by an insulating material. When an electric field is applied to the plates, the electrons on the plates will move, creating a current. Condensers are often used in power supplies and other electronic devices.
None of the above is the correct answer because it does not describe a synchronous motor that works on a leading power factor and does not drive a mechanical load.