Which coil in a transformer is responsible for receiving energy from the power source?

The primary coil in a transformer is responsible for receiving energy from the power source. In a transformer, it is connected to the input voltage supply, and its primary function is to create a magnetic field when an alternating current (AC) flows through it. This magnetic field then induces a voltage in the secondary coil via electromagnetic induction.

The primary coil is essential because it initiates the energy transformation process, converting electrical energy into magnetic energy. The design of transformers relies on the principle of induction, where the energy from the primary coil is transferred to the secondary coil, allowing for voltage transformation based on the turns ratio between the two coils.

The other choices refer to components that do not perform the initial role of energy reception. The secondary coil is responsible for delivering transformed energy to the load, the inductive coil is a term that may describe coils used in various applications but does not specifically refer to the functional components of a transformer, and a load coil typically refers to a resistance in an electrical circuit rather than a component of the transformer itself.