How is the power changed between primary and secondary loops of any transformers
Answers
Answer:
The strange ability to keep the total powerthe same, but change the current and voltage comes from electromagnetic induction. This ability is often referred to as transformer action, which describes how the transformer changes an AC signal from its primary to its secondary component. When an AC signal is applied to the primary coil, the changing current causes a magnetic field to change (get bigger or smaller). This changing magnetic field (and associated magnetic flux) will pass through to the secondary coil inducing a voltage across the secondary coil, thereby effectively coupling the AC input from the primary to secondary component of the transformer. The voltage applied to the primary component will also be present in the secondary component.
As mentioned before, transformers do not allow DC input to flow through. This is known as DC isolation.[2] This is because a change in current cannot be generated by DC; meaning that there is no changing magnetic field to induce a voltage across the secondary component.