How a Transformer Changes Voltage
Changing voltage with electromagnetic induction
1:04 · 720p · With AI narration and captions. This sample was made with the same system as this service.
Narration (full text)
Click a time to play from that scene.
The Transformer
A transformer is a device that changes the voltage of alternating current. The key is electromagnetic induction.
Inside a Transformer
A primary coil on the input side and a secondary coil on the output side are wound around an iron ring called the core.
AC Changes the Flux
When alternating current flows through the primary coil, it creates magnetic flux in the core that constantly changes direction and strength.
Induced Voltage
As the changing flux passes through the secondary coil, electromagnetic induction creates a voltage in that coil.
Turns Ratio = Voltage Ratio
The voltage ratio equals the turns ratio. With 100 turns on the primary and 50 on the secondary, the voltage is cut in half.
It Doesn't Work with DC
With direct current, the flux stays constant and never changes, so no voltage appears in the secondary coil.
Send High, Use Low
Power is sent at high voltage to reduce losses, and transformers near homes step it down for everyday use.
Turns Ratio Sets the Voltage
A transformer uses changing magnetic flux to set the voltage by the ratio of its turns.
Create 3D explainer videos like this sample from your documents and chat
Just attach product documents, drawings, or CAD data and tell the AI in chat what video you want. The AI plans the storyboard, builds the 3D scenes, and turns it into a video with narration and captions. You pay only for what you use (a rough guide is about 3,500 credits for a 1-minute video with 2 small revisions).
