Primaarikäämi

Primaarikäämi is a Finnish term that translates to "primary coil" in English. It refers to the coil of wire in a transformer that is connected to the input power source. This coil is responsible for receiving electrical energy and creating a magnetic field. The number of turns in the primary coil, along with the voltage applied to it, determines the strength of this magnetic field. When alternating current flows through the primary coil, it generates a changing magnetic flux within the transformer's core. This changing magnetic flux is then transferred to the secondary coil, which is also a coil of wire wound around the same core. The interaction between the primary coil and the magnetic field is fundamental to the operation of all transformers. The concept of the primary coil is crucial in understanding how transformers step up or step down voltage, a process vital for efficient power distribution and various electronic applications. Without a primary coil, a transformer would be unable to initiate the electromagnetic induction process that allows for voltage transformation.