Physics for IGCSE & O level - Magnets And Currents (Section 6 - No. 39)
If the primary voltage is 240V and the secondary voltage is 12V in a transformer, is it a step-up or step-down transformer?
Step-up
Step-down
Isolation
Autotransformer
Vysvětlení
The output voltage is less than the input voltage, showing step-down operation.