Question

Which of the following is a transformer used for?

Answer 1

A transformer is used to increase or decrease a voltage.  BUT ... it has to be an AC voltage, or the transformer doesn't work.

Answer 2

Answer: Increase or decrease a voltage

Explanation: Transformers are designed for increasing or decreasing the voltage in an electrical circuit, using the principle of electromagnetic induction.

These only work with alternating currents, because this alternating current drifts in the generation of permanent magnetic flux. The arrangement to make this possible consists of a pair of coils with a number of different spirals isolated from each other, and a ferromagnetic material is added to the core to optimize the magnetic flux.  Thanks to the different number of spirals in the coils the increase or decrease of the voltage is achieved.

The voltage transformation follows the following mathematical formula:

$\frac{V_{s} }{V_{p} }=\frac{N_{s} }{N_{p} }$

Where

[tex]\V_{s} =  Secondary voltage

[tex]\V_{p} = Primary voltage

[tex]\[N_{s} = Secondary number of spirals

[tex]\N_{p} = Primary number of spirals